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California Initiative/Referendum Data (2000-2012) (ICPSR 34627)

Principal Investigator(s): Hastings, Jeff, Utah State University. Department of Political Science


This data collection contains information about initiative/referendum campaigns in California from 2000 to 2012. Information was gathered regarding campaign donations, expenditures, interest group involvement, legal challenges, and mainstream newspaper coverage for each initiative and referendum. The data includes whether the campaigns concerned certain issues related to the environment, law enforcement, and controversial issues such as abortion and same-sex marriage. Additionally, the collection noted whether the election takes place in a presidential year, an even year, and whether the campaign is on the November ballot.

Access Notes

  • Data in this collection are available only to users at ICPSR member institutions. Please log in so we can determine if you are with a member institution and have access to these data files.


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Study Description


Hastings, Jeff. California Initiative/Referendum Data (2000-2012). ICPSR34627-v1. Ann Arbor, MI: Inter-university Consortium for Political and Social Research [distributor], 2013-05-21. https://doi.org/10.3886/ICPSR34627.v1

Persistent URL: https://doi.org/10.3886/ICPSR34627.v1

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Scope of Study

Subject Terms:    campaign contributions, campaign expenditures, constitutional amendments, constitutional change, elections, legal proceedings, referendum

Smallest Geographic Unit:    state

Geographic Coverage:    California, United States

Time Period:   

  • 2000--2012

Date of Collection:   

  • 2000--2012

Unit of Observation:    Initiative/Referendum Campaign

Universe:    California Initiative/Referendum Campaigns

Data Type(s):    administrative records data, aggregate data, observational data


Study Purpose:    This data collection uses a binomial regression model that calculates the likelihood of a legal challenge based upon information from initiative/referendum campaigns from 2000 to 2012 years in California.

Mode of Data Collection:    record abstracts

Extent of Processing:   ICPSR data undergo a confidentiality review and are altered when necessary to limit the risk of disclosure. ICPSR also routinely creates ready-to-go data files along with setups in the major statistical software formats as well as standard codebooks to accompany the data. In addition to these procedures, ICPSR performed the following processing steps for this data collection:

  • Created variable labels and/or value labels.
  • Checked for undocumented or out-of-range codes.


Original ICPSR Release:   2013-05-21



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