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Self-published

Spatial Distribution of State Capacity in Historical China, 200 BCE - 1900 CE (ICPSR 309570)

Released/updated on: 2026-08-14
Geographic coverage: China
Time period: 0220-01-01--1900-12-31

This study examines how demand for public goods shaped state-building in historical China. The dataset is a grid-cell–by-century panel dataset covering historical China from roughly the 2nd century BCE to the 19th century CE. Each observation is a ~1,000 km² grid cell (id_grid) in a given century (id_century). It combines multiple measures of state capacity (e.g., administrative center density, tax revenue, length of roads, number of post stations), potential drivers of state building (e.g., proximity to foreign-war frontline, proximity to the Yellow River, population density, distance to capital, and trade routes), and measures of local institutions (e.g., lineages, Buddhist temples, and ethnic-minority leadership). The dataset enables a quantitative analysis of the evolution of the state-locality relationship over time.

Self-published

Sailing Ship Technology, Navigation and the Duration of Voyages to Australia, 1848-85 (ICPSR 309405)

Released/updated on: 2026-08-12
Geographic coverage: Australia, Western Europe
Time period: 1848-01-01--1885-12-31

STATA files for estimates of the duration of sailing-ship voyages from Europe to Adelaide and Melbourne (Australia) in the mid-nineteenth century as functions of the characteristics of ships and of the rotes taken.

Self-published

Large-Scale Public Hiring, Wages, and Community Outcomes: Evidence from the Works Progress Administration (ICPSR 309207)

Released/updated on: 2026-08-07
Geographic coverage: United States
Time period: 1930-01-01--1940-12-31

Using discontinuities in the wage schedule of the Works Progress Administration (WPA), I document that higher WPA wages led to greater WPA employment but did not significantly reduce unemployment levels. The estimated impact on private wages is positive but imprecise. Higher WPA wages did not influence the characteristics of WPA employees. However, they led to lower school dropout rates of 15–16-year-old boys in WPA households.

Self-published

Replication data for "Crowd-Sourced Chinese Genealogies as Data for Demographic and Economic History" (ICPSR 250178)

Released/updated on: 2026-08-05
Time period: 1600-01-01--1900-12-31
This collection contains the code, de-identified analysis inputs, and documentation needed to reproduce the tables and figures for “Crowd-Sourced Chinese Genealogies as Data for Demographic and Economic History.” The study evaluates whether crowd-sourced Chinese genealogical records can reproduce established demographic patterns and support regression-based research in economic history.The underlying source compilation contains 192,310 unique individuals associated with 535 family roots, spanning many centuries and all provinces of China. The records were harvested from the FamilySearch Family Tree, reconnected into multigenerational pedigrees, de-duplicated, and geocoded to county-level administrative units. The analysis documents population growth, sex ratios, and migration, compares these patterns with benchmarks from Chinese historical demography, and presents regressions relating province-century sex ratios to recorded childlessness and patrilineal generation depth to out-migration.The deposit contains de-identified analysis inputs derived from these records: aggregated files for cell-level analyses and record-level files retaining only the variables required for the documented specifications. Personal names, full relationship records, original person-level FamilySearch identifiers, and crosswalks to the original identifiers are not included because FamilySearch terms restrict redistribution of harvested person and relationship records. The included Stata and Python scripts reproduce the deposited tables and figures from these analysis inputs. Appendix Figure A.1 and externally sourced benchmark tables are not included.
Self-published

Decentralization and Local Governance: Fiscal Consequences of the Indirect Mayoral Elections on Italian Primary Education (ICPSR 308217)

Released/updated on: 2026-07-16
Geographic coverage: Italy
Time period: 1866-01-01--1895-12-31

This dataset was assembled to study the fiscal effects of Italy's 1889 Crispi Law, which introduced indirect mayoral elections in municipalities with more than 10,000 inhabitants or district-capital status. It combines archival municipal budget records with population and enfranchisement data to enable a difference-in-discontinuities analysis of how the reform affected local public spending, particularly on primary education.

The dataset covers 8,257 Italian municipalities and includes: (i) digitized municipal-level fiscal data (public revenues and expenditures, including per capita primary education spending) for the years 1884 and 1895, drawn from official budget records; (ii) municipal expenditure on primary schooling for 1862-63, from Ministero dell'Educazione Nazionale (1865); (iii) local enfranchisement rates for 1865-66 and 1895, distinguishing tax-based and literacy-based voting eligibility, from MAIC (1867) and MAIC (1897); and (iv) a set of municipality-level covariates (e.g., demographic and geographic characteristics) used as controls in the empirical analysis. All monetary values are expressed at 1911 constant prices. The analytical sample is restricted to municipalities with populations between 3,000 and 30,000 (2,587 municipalities) to ensure a credible comparison group around the 10,000-inhabitant policy threshold.

Self-published

Replication Data for: Why Was the Wheel (Not) Used in the Andes? Wagon Transport Adoption in Nineteenth-Century Colombia (ICPSR 307689)

Released/updated on: 2026-07-15
Geographic coverage: Colombia
Time period: 1500-01-01--1900-12-31

This is the replication package for “Why Was the Wheel (Not) Used in the Andes? A Hypothesis Explaining the Slow Adoption of Wagon Transport and Evidence from Nineteenth-Century Colombia.” The package includes the data, code, and documentation necessary to reproduce the analyses, tables, and figures reported in the article.The study examines the slow adoption of wagon transport in the Andes through a threshold technology-adoption model calibrated with historical and physiological evidence on human, mule, and wagon transport costs. The data refer primarily to nineteenth-century Colombia and include information on transportation routes, route characteristics, traffic demand, energy-based transport costs, and the comparison between animal-pack transport and wagon-road transport.The replication files allow users to reproduce the model calibration, the construction of key variables, and the empirical and quantitative exercises used to evaluate why wagon transport became economically viable only after transport demand crossed a threshold sufficient to offset the fixed costs of wagon-road construction.

Self-published

Indian Deindustrialisation Revisited: New Data, Estimates, and Interpretations (ICPSR 251096)

Released/updated on: 2026-07-07
Geographic coverage: India
The fate of the hand loom cotton textile industry is one of the most debated topics in the economic history of India. This paper presents novel employment estimates for cotton textile hand weaving and spinning in the period 1800-1940. I put together plausible values for labour productivity and combine these with aggregate input usage to generate employment estimates. I then examine a number of related topics: The regional question; the relationship between hand loom and power loom cloth from the consumer’s perspective; the standard of living of hand loom weavers; and the impact of technological progress within the hand loom industry.
Self-published

Replication data and code Andrea Ramazzotti "Wage Setting Institutions and Internal Migration: The Effect of Regional Wage Equalization in Italy after 1969" (ICPSR 251017)

Released/updated on: 2026-07-02
Geographic coverage: Italy
Time period: 1962-01-01--1981-12-31
Replication package for the paper by Andrea Ramazzotti, "Wage Setting Institutions and Internal Migration: The Effect of Regional Wage Equalization in Italy after 1969". Paper's abstract: "Do minimum wages create spatial mismatches in local labour markets by affecting migration decisions? National wage floors are often motivated by fairness, but ignoring regional productivity differentials can negatively alter incentives to migration. This paper addresses these concerns by studying a reform that, in 1969-1972 Italy, equalized nominal values of sectoral minimum wages across the national territory. Using an original dataset of migration flows and labour market variables for 1962-1981, the paper shows that the reform was associated with a drop in internal migration and with the inception of spatial mismatches that characterize Italy’s labour markets to this day."The replication package provides data, code and/or instructions to replicate tables and figures in the paper.
Self-published

How to survive in a protectionist world? (ICPSR 251046)

Released/updated on: 2026-07-02
Geographic coverage: Switzerland
Time period: 1886-01-01--1913-12-31
This article examines the diversity of protectionist forms that underpinned Switzerland's successful international integration during the first globalization (1886-1913). While the literature on the tariff-growth paradox has largely treated commercial policy as a homogeneous macroeconomic phenomenon, this article argues that Swiss protectionism was inherently sectoral and diverse, and that this diversity resulted from a deliberate political construction rooted in the organized capitalism that emerged in Switzerland during this period. The analysis combines qualitative institutional analysis of Swiss archival material with quantitative analysis based on bootstrap-corrected Granger causality tests and Impulse Response Functions, applied to an original database constructed from Swiss customs registers and disaggregated into 14 sectors and 12 subsectors. We show that the interaction between the interests of the dominant social bloc and those of the federal government gave rise to different form of protectionism, depending on the industries concerned and the objectives pursued. The article extends the existing typology of protectionism by identifying two new modalities specific to the Swiss case—"downstream pressure" and "crowding-out" protectionism – alongside a two-phase distinction within infant industry protection. It further demonstrates that the relationship between commercial and industrial policy is bidirectional and sector-specific, thereby invalidating any single-dimensional reading of Swiss protectionism.
Self-published

Replication Files for "Modern Technology on Traditional Farms: The Impact of Electric Irrigation on Rural Farms in Early Twentieth-Century China" (ICPSR 307062)

Released/updated on: 2026-06-22
Geographic coverage: China
Time period: 1912-01-01--1933-12-31

This is the replication package for:

Shiyu Bo, Xiaomeng Cui and Cong Liu. "Modern Technology on Traditional Farms: The Impact of Electric Irrigation on Rural Farms in Early Twentieth-Century China," Journal of Economic History, forthcoming.

Please consult the "Readme" file in the package for a more detailed description.

Self-published

State Antiquity Index (“Statehist”) Version 3.1 and updates (ICPSR 250021)

Released/updated on: 2026-06-19
Time period: 2003-06-15--2017-11-10
An index of state antiquity was developed by Brown University Professor of Economics
Louis Putterman and then Brown University undergraduate Valerie Bockstette circa 1999
– 2000 to test the proposition that present-day countries that had been the site of nation-
states, kingdoms or empires over longer spans of history have achieved more rapid
economic development in recent decades. This proposition or conjecture was suggested
to us by the observation that countries in East Asia, with long histories of nationhood,
have done much better economically in the late 20 th century than have countries in sub-
Saharan Africa on which the nation-state was imposed by 19 th century colonization. It
was suggested by Burkett, Humblet and Putterman (1999) that stocks of human capital
associated with a country’s culture and the opportunities it affords citizens to learn-by-
doing may vary from country to country as a result of very long-term historical processes,
such that countries where intensive agriculture, urbanization, use of money, taxation, and
government administration developed earlier may have been at an advantage in
modernizing under late 20 th Century conditions. (The idea is further developed in
Putterman, 2000.) Whereas Burkett et al. used population density and related indicators
of agricultural intensity as their proxies for early development, Bockstette, Chanda and
Putterman (2002) used the index of state antiquity for a similar purpose. Both higher
population density and earlier state development turned out to be good predictors of
recent rates of economic growth.
Self-published

Agricultural Transition Data Set (ICPSR 250024)

Released/updated on: 2026-06-19
Estimates the year when the first significant region within each of 165 present-day countries underwent a transition from reliance mainly on gathered wild and hunted food sources to reliance mainly on cultivated crops (and livestock). Details are provided in the data description file; data are in xls format.
Self-published

World Migration Matrix, 1500-2000 (ICPSR 250025)

Released/updated on: 2026-06-19
The matrix gives, for each of 165 countries, an estimate of the proportion of the ancestors in 1500 of that country's population today that were living within what are now the borders of that and each of the other countries. The matrix itself is an Excel spreadsheet. Accompanying documents are a Main Appendix, providing an overview of the information and its sources, and region appendices for Africa, Americas , Asia, Europe, and Oceania , which include a one paragraph or one page explanation of the estimate for each individual country. The first version of the data set was completed in March, 2007. Revisions of some entries, mainly of countries in the Americas, using information from genetic studies to estimate the ancestry of large groups of mixed origin, were completed in August, 2009 and are incorporated in the new matrix version labeled 1.1. Links to both original and new versions of those files that have undergone change are found below.
Self-published

This is the replication package for the article "Commitment Failure and the Fiscal Costs of Great-Power Rivalry: The Roman–Seleukid Confrontation, 200–188 BCE." (ICPSR 249893)

Released/updated on: 2026-06-11
Description This is the replication package for the article "Commitment Failure and the Fiscal Costs of Great-Power Rivalry: The Roman–Seleukid Confrontation, 200–188 BCE." The article reconstructs the fiscal and mobilisation costs of the war between Rome and the Seleukid empire of Antiochus III and of its settlement in the Treaty of Apamea (188 BCE). It treats the fifteen-thousand-talent indemnity not as a diplomatic curiosity but as a structured fiscal shock, and argues that its burden is mismeasured when set only against gross Seleukid revenue and is correctly read against discretionary, or free, fiscal capacity. The reconstruction is source-graded: every quantity is tied to a cited ancient passage or to identified modern scholarship and is assigned an explicit verification level, and the fiscal denominator is built as a bounded expenditure-side envelope rather than asserted as a point estimate. This package contains the data and code required to regenerate every quantitative value reported in the manuscript's tables. It comprises:
  • data/ — CSV inputs: model parameters (metrology, pay rates, ration masses, campaign lengths); Seleukid gross-revenue scenarios; attested army sizes by engagement and side; comparative Roman war indemnities of 241, 201, 197, and 188 BCE; Polybian grain-ration components; a preliminary geodesic route-control index; indicative campaign-cost scenarios; and the coded sequence of commitment episodes.
  • regenerate_tables.py — a Python 3 script (standard library only) that reads the CSV inputs and reproduces the table values, printing both exact and manuscript-rounded figures where they differ.
  • source_register.csv — every figure mapped to its primary or secondary source and an assigned verification level.
  • codebook.md — variable definitions, the verification scheme, and the derivation formulas.
  • README.md — package documentation and a source-rights note.
  • CHECKSUMS.sha256 — SHA-256 checksums for all files.
To reproduce the results, run: python3 regenerate_tables.py. No third-party dependencies are required. The printed values match the manuscript tables to the rounding shown there. All quantitative inputs derive from public-domain ancient texts (Polybius, Livy, Appian) and from cited modern scholarship by figure only; no copyrighted text is redistributed. The Seleukid fiscal figures are drawn from G. G. Aperghis, The Seleukid Royal Economy (Cambridge University Press, 2004), with the underlying figures page-auditable in the author's open-access doctoral thesis (G. G. Aperghis, The Seleukid Royal Economy, PhD thesis, University College London, 2000; UCL Discovery), specifically the gross-revenue range and the small-surplus conclusion at pages 199 and 247–249, military and army pay at pages 198–199 and 213, the handling of commodity surpluses in kind at pages 202–204, land grants to military settlers in chapter 6 at pages 88–110, and regional provincial revenue at page 241. This Zenodo deposit is an archival mirror. The primary replication archive is deposited with openICPSR in accordance with the data-availability policy of the Journal of Economic History. Keywords Seleukid Empire; Treaty of Apamea; war indemnities; fiscal-military state; war finance; ancient economic history; Hellenistic economy; commitment problems; great-power rivalry; Antiochus III; Roman Republic; Polybius; Livy; Appian; military mobilisation; replication data Subjects Economic history; Ancient history; Fiscal and financial history; Public finance; Hellenistic history; Roman history; International relations; Quantitative ancient history
Self-published

Colonialism on the Cheap: The French Empire 1830–1962 (ICPSR 306336)

Released/updated on: 2026-06-01
Geographic coverage: France
Time period: 1833-01-01--1962-12-31

How much did France pay for its colonial empire? Did colonies benefit from large transfers from French taxpayers and private investors, or were they, on the contrary, drained of their capital? This paper uses novel budgetary, private investment, and loan data to compute monetary flows between France and the colonies between 1833 and 1962. Public expenditure spent by France on the empire represented only 1.3 percent of its GDP, of which four-fifths was for the military. Trade balance deficits of French colonies were not counterbalanced by large public or private capital transfers from France to the colonies, but by military expenditure from the metropole. Overall, large sums of money were flowing from the colonies to the metropole, a "drain" representing a couple of percentage points of colonial GDP, making French colonies comparable to British India in the twentieth century.

Self-published

Economic Dynamics of the Early Roman Empire: Insights from Lead Pollution, Coinage, Weather, and War (ICPSR 247471)

Released/updated on: 2026-04-17
Geographic coverage: Other: Western Europe
Time period: 0001-01-01--0180-12-31
This repository contains the Stata data and code necessary to replicate the empirical analysis presented in Oddo, Traverso, and Verboven (2026). 
The paper investigates the relationship between anthropogenic lead pollution recorded in Greenland ice cores and a set of variables plausibly linked to the economic dynamics of the Early Roman Empire during the Pax Romana (27 BC – 180 AD). Specifically, the analysis examines whether annual variations in lead emissions can be systematically explained by summer temperature anomalies (a proxy for agricultural surplus), Roman coin output (a proxy for monetary dynamics), and the occurrence of wartime years. The analysis combines high-resolution paleoclimatic, paleoenvironmental, archaeological, and historical data at an annual frequency, providing one of the first systematic investigations of short-term economic fluctuations in an ancient society.
The replication materials allow users to reproduce all tables and figures reported in both the main text and the appendix of the paper.
Self-published

“Shining Light on a Statistical Dark Age: Postal Activity in Antebellum America.” (ICPSR 304323)

Released/updated on: 2026-04-13
Geographic coverage: United States
Time period: 1790-01-01--1860-12-31

The project examines the origins of modern economic growth in the antebellum United States.

It compiles statistics on postal activity available on an annual or biennial basis at the county level

to shed light of the expansion of economic activity. It also extends Easterlin state-level income estimates

for 1840 to the county level.

Self-published

Measuring Financial Stress under the Gold Standard: Evidence from Interwar Czechoslovakia (ICPSR 247312)

Released/updated on: 2026-04-07
Geographic coverage: Other: Europe
Time period: 1929-01-01--1938-12-31
This paper constructs a monthly Financial Stress Index (FSI) for interwar Czechoslovakia covering November 1929 to September 1938, corresponding to the gold-standard phase of the First Czechoslovak Republic. Using eleven standardised indicators from financial markets, banking and monetary conditions, and the real economy, the paper develops a composite measure of systemic stress for a small open economy operating under the institutional constraints of the interwar gold standard. The estimated chronology is delayed and clustered: stress intensifies after 1931, peaks in 1932–1933, and eases only after the 1934 devaluation of the koruna. The paper evaluates the stability of this chronology under alternative weighting schemes, alternative standardisation procedures, leave-one-variable-out exercises, and alternative crisis-threshold definitions. It further assesses the external validity of the index through predictive regressions for subsequent movements in trade, industrial production, prices, and related macroeconomic indicators. The results show that the main chronology is robust to alternative constructions and that the Czechoslovak Depression is better characterized as a prolonged regime of systemic strain than as a single banking panic. The paper contributes a new monthly macro-financial series for interwar Czechoslovakia and a transparent framework for measuring historical financial stress in data-constrained environments.
Self-published

Commercial Hysteresis: Persistence and Reorganization in Europe’s Bilateral Trade Geography during the Great Depression (ICPSR 247132)

Released/updated on: 2026-03-25
Geographic coverage: Other: Europe
Time period: 1927-01-01--1938-12-31
This paper examines whether the Great Depression fundamentally remapped Europe’s bilateral trade geography or whether pre-crisis partner structures remained durable through the 1930s. Using a newly constructed bilateral trade panel for twenty-one European countries, 1927–1938, it studies persistence and reallocation in bilateral trade relations. The results show strong continuity: by 1937, partner rankings still resembled those of 1928, and most countries retained at least two pre-crisis core partners. Yet post-1931 shocks weakened inherited structures, especially on the import side. Germany became a distinctive focal partner within this selective reorganization. Interwar Europe thus exhibited commercial hysteresis rather than wholesale remapping.
Self-published

A Graduated Poll Tax: Spain, 1874–1943 (ICPSR 247021)

Released/updated on: 2026-03-19
Geographic coverage: Spain
Time period: 1881-01-01--1937-12-31
The impuesto de cédulas personales was a graduated poll tax levied on all adults in Spain from 1874 to 1943.This project contains three data files deposited in connection with the paper. Artola Blanco, Miguel, and Joana Maria Pujadas-Mora. "Measuring Income Inequality Using a Graduated Poll Tax: Spain, 1874–1943." European Review of Economic History (under review).The files correspond to the three empirical sections of the paper: a cross-sectional microdata sample from Madrid (1902), a longitudinal microdata collection from San Feliu de Llobregat (1883–1937), and a cross-sectional municipal dataset covering approximately 8,000 Spanish municipalities (1919).
Self-published

Travel Speed over the Longue Durée (ICPSR 245927)

Released/updated on: 2026-02-16
Geographic coverage: Other: Europe
Using the daily travel itineraries of medieval kings, I create near-continuous time series of travel speed along roads in England and France over four centuries. The files contained within replication the figures and tables in my paper "Travel Speed over the Longue Durée."
Self-published

Success and failure in England’s patent system: New evidence from patent applications, 1783-1834 (ICPSR 245009)

Released/updated on: 2026-02-09
Geographic coverage: England, United Kingdom
Time period: 1783-01-01--1834-12-31
This project contains the dataset and replication packages used in the paper, 'Success and failure in England's patent system: New evidence from patent applications, 1783-1834'.The dataset contains patent applications relating to 5,328 granted patents and 722 non-granted patents filed between 1783 and 1834.Each Zip file contains the relevant 'README' document.
Self-published

Bloodlines of Power: Family Background and Elite Career Advancement in the Nineteenth-Century Russian Bureaucracy and Army (ICPSR 244445)

Released/updated on: 2026-01-20
Geographic coverage: Russia
Time period: 1800-01-01--1881-12-31
This dataset contains individual-level career histories of senior civil servants and generals in the Russian Empire during the nineteenth century (1800–1881). It is based on the complete published Seniority Lists of civil and military elites and linked genealogical sources. The sample is restricted to individuals with confirmed paternal background, including only cases where a father’s membership in the civil or military elite is positively verified or where it is reliably established that the father did not belong to the elite. The data record timing of promotions within the Table of Ranks, elite attainment, institutional affiliation, noble titles, and family background, and are designed to support replication and further research on intergenerational mobility and elite reproduction.
Self-published

Data for replication of "Persistent Specialization and Growth: The Italian Land Reform" (ICPSR 241087)

Released/updated on: 2025-12-09
Geographic coverage: Italy
Time period: 1936-01-01--2001-12-31
This project includes all the data and code necessary to replicate the figures and tables in the paper "Persistent Specialization and Growth: The Italian Land Reform" by Bianchi-Vimercati, Lecce, and Magnaricotte (conditionally accepted by Explorations in Economic History as of 12/09/2025). The main dataset included in this repository combines several data sources as described in the relevant paper. A short description of the data and instructions on how to replicate tables and figures is also included in this repository.
Self-published

Replication package for: "Delegating governmental authority to private actors: Lordships, state capacity and development" (ICPSR 241030)

Released/updated on: 2025-12-06
Geographic coverage: Spain
This paper investigates the consequences of delegating governmental authority to private actors through the study of lordships, a pivotal political institution in historical Europe. I first document a negative relationship between being a seigneurial town and central state capacity in ancien-regime Spain. Next, I focus on the Kingdom of Granada after its conquest by Castile in 1492 to leverage on that the initial distribution of lordships was conditionally exogenous, with the results corroborating the negative effect of lordships on state capacity. I further show two additional important results. First, the effect is very persistent, with former lordships towns featuring less state capacity almost a century after the abolition of the seigneurial regime. Second, there is a non-monotonic effect on economic growth. Contrary to conventional wisdom, lordships towns did not underperform royal towns during the Ancien Régime. Yet, despite not having started with disadvantage, former seigneurial towns experienced lower population growth from the 1910s onwards, a period in which the Spanish state started to play a bigger investment role. Thus, towns with historically less state presence benefited less from state’s investments, lagging behind.
Self-published

Replication materials "Missing Markets: Microstructure and Liquidity on the London Stock Exchange" (ICPSR 240825)

Released/updated on: 2025-12-02
Geographic coverage: Wales, United Kingdom, Scotland, United Kingdom, England, United Kingdom
Time period: 1877-01-01--1877-12-31
Abstract: This paper studies the behavior of specialist dealers operating in the London Stock Exchange in the 1870s. The LSE was a free-entry exclusive dealers market, where dealers were free to choose which securities to deal in. We show that dealers concentrated their market making in the most liquid securities. A combination of adverse selection and inventory costs prevented the development of liquid markets in most securities, with dealers opting instead to provide matchmaking services. Our results call for a re-appreciation of the liquidity of the London market and offer a new interpretation of stylized facts about the Victorian investor behavior.
Self-published

Weighted Crosswalks for NAICS and SIC Industry Codes (ICPSR 145101)

Released/updated on: 2025-07-15
We provide weighted crosswalk files for the purpose of bridging Standard Industrial Classification (SIC) codes and North American Industry Classification System (NAICS) codes.  SIC codes were the standard industry classification system for decades, but they eventually couldn’t keep up with the changing industrial structure of the 1990s.  NAICS codes took over in 1997 and quickly became the reporting system for most government statistics in the US and elsewhere.  This switch (and subsequent NAICS updating) poses a problem for researchers since it imposes an artificial break in time series data.  Unweighted crosswalk tables can help connect the two systems, but the many splits and merges create mappings that are not one-to-one.  For situations that require one-to-one translations, researchers find themselves guessing as to the best match.  And for situations where splitting and merging is acceptable, choosing weights sometimes feels arbitrary.  The crosswalks included here contain weighting variables that make it possible to smoothly bridge between systems and all NAICS updates in a nonarbitrary way.  Three different weighting schemes are included.  The first based on employment, the second based on number of establishments, and the third based on total payroll.  NOTE THE MAJOR EXPANSION/UPDATE IN JULY 2025.  USE LATEST VERSION!
Self-published

Education and Wartime Mobilization: Evidence from Colonial Korea during WWII (ICPSR 236061)

Released/updated on: 2025-07-15
Geographic coverage: South Korea, North Korea
Time period: 1910-01-01--1945-12-31
This study examines the effect of colonial education on  the mobilization of Koreans during World War II. Considering an educational expansion policy that doubled the number of public primary schools in Korea, we employ a difference-in-differences strategy that exploits cross-regional variations in the expansion of primary schools and cross-cohort variations in exposure to school expansion. We show that the expansion of public primary education significantly increased the military mobilization of Koreans. Exploiting the design of the expansion policy, we use an instrumental variable approach and show that the results remain qualitatively unchanged. We discuss several potential mechanisms underlying our findings.
Self-published

[Replication package for] Reconstructing history: Using language to estimate religious spread (ICPSR 233003)

Released/updated on: 2025-06-17
Geographic coverage: Earth
This is the replication package for "Reconstructing history: Using language to estimate religious spread" Forthcoming in the Journal of Economic History, December 2025 issue.We introduce a data-driven approach to use language to reconstruct history, and apply the methodology to estimate the geographic origins of religious spread. To validate the approach, we use language data to estimate origins of Islam and Buddhism to within 500km of their true (and uncontested) origins. We then apply the methodology to the more complex (and contested) cases of Christianity, Judaism and Hinduism. We show that language-based estimates, in these cases, are significantly more aligned with the origin of scripture than to the origin of the religion.
Self-published

The Economic Power of Elites, Human Capital, and Industrial Change in Late Imperial Russia (ICPSR 231104)

Released/updated on: 2025-05-26
Geographic coverage: Other: Europe
Time period: 1860-01-01--1911-12-31
This project studies the economic impacts of land ownership concentration among the aristocratic elite in the Russian Empire. I document that areas with a higher concentration of noble land ownership were associated with lower levels of primary education during 1880-1911. Exploring the mechanisms, I show that by controlling local governments the landed elites decreased public spending on education, shifting the financial burden to peasant households in the 1880s-1890s. I also demonstrate that the extension of school provision through a government program of schooling subsidies after 1905 led to a relatively large increase in enrollment rates in regions with high noble landownership concentration, suggesting initial underinvestment in education in these areas. Finally, the paper identifies a significant negative influence of landed elites on industrial growth and firm productivity, with up to 56\% of this effect attributable to the human capital channel.
Self-published

The Historical and Expected Equity Risk Premium in Spain: A Long-Run View, 1900-2020 (ICPSR 211601)

Released/updated on: 2025-04-25
Geographic coverage: Spain
Time period: 1900-01-01--2020-12-31
Replication data for manuscript "The Historical and Expected Equity Risk Premium in Spain: A Long-Run View, 1900-2020". We present revised estimates of the historical (ex post) equity risk premium and an original estimate of the expected (ex ante) premium for the Madrid stock market over a period of 120 years. The results are based on a new equity index, the H-IBEX (1900-1987), built on high-quality monthly data hand-collected from primary sources and methodologically aligned with the modern Spanish index, IBEX35. We also reconstructed an original weighted index of government bonds (1900-1987) which can be smoothly connected with recent data. Data include original series for equities, bonds and bills for the Madrid Stock Exchange from 1900 to 1987, at monthly and annual frequency, spliced with more recent data on equities (IBEX35) and bonds, to cover the period until 2020. Documentation includes three Excel files: monthly series, annual series and a summary of annual data.
Self-published

Data and Replication Package for "Do Local Conditions Determine the Direction of Science? Evidence from U.S. Land Grant Colleges" (ICPSR 221022)

Released/updated on: 2025-02-27
Geographic coverage: United States
Time period: 1840-01-01--2012-12-31
This is data, code, and replication instructions for "Do Local Conditions Determine the Direction of Science? Evidence from U.S. Land Grant Colleges." In this project, we test whether land grant colleges that are located in counties that are agriculturally unrepresentative relative to the rest of their states also tend to produce research focusing on more unrepresentative crops.
Self-published

Data and code for "The Electric Telegraph, News Coverage and Political Participation" (ICPSR 214861)

Released/updated on: 2025-01-05
Geographic coverage: United States
Time period: 1840-01-01--1852-12-31
This paper uses newly digitized data on the growth of the telegraph network in America during 1840–1852 to study the impacts of the electric telegraph on national elections. Exploiting the expansion of the telegraph network in a difference-in-difference approach, I find that access to telegraphed news from Washington significantly increased voter turnout in national elections. Newspapers facilitated the dissemination of national news to local areas. Text analysis on historical newspapers shows that the improved access to news from Washington led local newspapers to cover more national political news, including coverage of Congress, the presidency, and sectional divisions involving slavery.
Self-published

Hedges of the Second Republic: Firms, Equity Investors and Political Uncertainty in a Nascent Democracy, 1930-36 (ICPSR 211822)

Released/updated on: 2024-11-24
Geographic coverage: Spain
Time period: 1930-01-01--1936-12-31
Dataset for Battilossi, Stefano and Houpt, Stefan O., “Hedges of the Second Republic: Firms, Equity Investors and Political Uncertainty in a Nascent Democracy, 1930-36” (January 04, 2024), pre-print at SSRN: https://ssrn.com/abstract=4907670; forthcoming in Revista de Historia Económica-Journal of Iberian and Latin-American Economic History, https://doi.org/10.1017/S0212610924000168 
Self-published

The price and welfare consequences of the British Sugar Act of 1846 (ICPSR 210541)

Released/updated on: 2024-11-08
Geographic coverage: United Kingdom
Time period: 1840-01-01--1853-12-31
This is a replication kit for the paper "The price and welfare consequences of the British Sugar Act of 1846", as published in the Journal of Economic History.
Self-published

Lottery-Based Elections, Power Monopolization, and Urban Development: The Case of Swiss City-States, 1666-1794 (ICPSR 208361)

Released/updated on: 2024-08-14
Geographic coverage: Switzerland
Time period: 1666-01-01--1794-12-31
Early modern urban parliaments suffered an increasing monopolization of political power that hampered urban development. To combat power monopolization, some Swiss city-states reformed their election system by randomly selecting political representatives from a pre-elected pool of candidates. We implement a difference-in-differences design and find that lottery-based election systems improved the equality of distribution of political seats within parliaments. Lottery-based elections also had positive effects on trade tax revenues, trade volumes, and infrastructure expenditures. We explain this finding by showing that lottery-based election systems fostered the election of merchants to top political positions.
Self-published

Data for The Inefficacy of Land Titling Programs: Homesteading in Haiti, 1933—1950 (ICPSR 208208)

Released/updated on: 2024-07-29
Geographic coverage: Haiti
Time period: 1933-01-01--1950-12-31
One of the most common policy recommendations in developing countries is titling land. Yet, titling programs around the developing world frequently fail to produce many titles. We try to understand these failures by exploring a titling program in Haiti in the 1930s. The program offered tenants renting public land an opportunity to privatize the land as a homestead, giving them an official title and ending rental payments. Making use of archival data on all homesteads granted in the first 16 years, we find the program created fewer than 700 homesteads. We discuss potential reasons for the program’s failure and argue that it failed because it required homesteaders to farm at least 50% of the plot in cash crops. We discuss whether this requirement was the government’s attempt to extract revenues from the land in the absence of other options or whether it was an intentional barrier to resist foreign interference.
Self-published

Replication for Avaro_2024_Zombie International Currency (ICPSR 207762)

Released/updated on: 2024-07-08
Geographic coverage: Europe
Time period: 1945-01-10--1971-12-31
This is the replication package for the paper 'Zombie International Currency: The Pound Sterling 1945–1971'
Self-published

Droughts, Conflict, and the Importance of Democratic Legitimacy: Evidence from Pre-Industrial Europe (ICPSR 206441)

Released/updated on: 2024-06-22
Geographic coverage: Europe
Time period: 0900-01-01--1799-12-31
This research shows that droughts are robustly associated with city-level unrest in Europe over the years 900 to 1800 CE. This relationship is non-linear, with disproportionately greater increases in the probability of a conflict among droughts in the upper tail of the severity distribution. Elected city governments are relatively immune from drought-induced conflict, while those based on representation by burghers or guilds are not. These results suggest that local governments are key for maintaining social stability during economic shocks, and are most successful when they have a greater degree of democratic legitimacy.
Self-published

Careworn: The Economic History of Caring Labor (ICPSR 199041)

Released/updated on: 2024-03-16
Geographic coverage: England, United Kingdom
Time period: 1270-01-01--1870-12-31
Economists ignore caring labor since most is provided unpaid.  Disregard is unjust, theoretically indefensible, and probably misleading.   Valuation requires estimates of time spent and the replacement or opportunity costs of that time.  I use the maintenance costs of British workers, costs which cover both the material inputs into upkeep and the domestic services needed to turn commodities into livings, to isolate the costs of paid domestic labor. I then impute the value of unpaid domestic labor from these market equivalents, and aggregate across households without domestic servants. Historically, unpaid domestic labor represented c. 20 per cent of total income, a contribution that suggests the need to revise some standard narratives.
Self-published

Data for "Courts, Legislatures, and Evolving Property Rules" (ICPSR 198762)

Released/updated on: 2024-03-01
Geographic coverage: United States
Time period: 1831-01-01--1907-12-31
These data are used in our paper, "Courts, Legislatures, and Evolving Property Rules:  Lessons from Eminent Domain."  The state-level data set indicates whether and when U.S. states allowed (or prohibited) the use of the "benefit offset" when determining the amount of "just compensation" required for the application of eminent domain.  Some changes in the rules governing the benefit offset were determined by court rulings, while other changes were legislative.  The data also include variables to measure the expansion of rail lines during the 19th railroad boom, as well as other variables used in our analysis.
We have posted four files:
"Replication_do.do"  -  Stata do file that generates the econometric results
"Replication_data.dta"  -  Stata data file used by the the do file
"Figure 1b variable.xlsx"  -  Excel file for Figure 1b
"Table 4 variables.xlsx"  -  Excel file for Table 4
See our paper for additional information, including variable definitions and data sources.
Self-published

Calendar of Prisoners, England and Wales, 1870, 1883, and 1910 (ICPSR 198225)

Released/updated on: 2024-02-09
Geographic coverage: Wales, United Kingdom, England, United Kingdom
Time period: 1870-01-01--1910-12-31
Data collected for use in the Northwestern University dissertation "The Economics of Crime in Victorian England," submitted in 2013, and related publications listed here.
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