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These are the third and fourth waves of the PREHCO project (Puerto Rican Elder Health Conditions study) and have been developed between 2021 and 2024 as a collaboration between the University of Alabama at Birmingham and the University of Puerto Rico. The project began as a cross-sectional study of the non-institutionalized population aged 60 years or older in Puerto Rico. These waves followed the survivors of the original participants at the beginning of the fieldwork and aimed to examine the predictors of cognitive decline, disability, and mortality. The fourth wave of this study extends the follow-up of PREHCO to between 21 and 22 years after the initial data collection and aims to examine the predictors of cognitive decline, disability, and mortality.

PREHCO was designed as a study comparable to the Multicenter Project on Health and Well-being of Older Adults in Latin America and the Caribbean (SABE) developed by the Pan American Health Organization (PAHO) in several cities in Latin America, and with some studies carried out in the United States, mainly the Health and Retirement Study (HRS).

For this purpose, a questionnaire was designed that included sections on health conditions, physical and mental disability, functionality, use of medicines, health needs and social services, access to and use of health services, abuse, migration, housing conditions, patterns of help from family, community and public and government agencies, and others.

Since its inception, PREHCO has been funded with federal funds from the National Institute on Aging (NIA). Initially it was a project between the University of Wisconsin-Madison and the University of Puerto Rico from 2000-2009.

By tapping into the perspectives of older adults and their caregivers, the University of Michigan National Poll on Healthy Aging (NPHA) helps inform the public, health care providers, policymakers, and advocates on issues related to health, health care and health policy affecting Americans 50 years of age and older.

The poll is designed as a recurring, nationally representative household survey of U.S. adults, which allows assessment of issues in a timely fashion.

Launched in spring 2017, the NPHA is modeled after the highly successful University of Michigan C.S. Mott Children's Hospital National Poll on Children's Health. The NPHA grew out of a strong interest in aging-related issues among many members of the University of Michigan Institute for Healthcare Policy and Innovation (IHPI), which brings together more than 600 faculty who study health, health care and the impacts of health policy. IHPI directs the poll which is sponsored by AARP and Michigan Medicine, the University of Michigan academic medical center.

More waves of the NPHA data can be found on the NACDA-OAR site:

• National Poll on Healthy Aging (NPHA), [United States], October 2017
• National Poll on Healthy Aging (NPHA), [United States], March 2018
• National Poll on Healthy Aging (NPHA), [United States], October 2018
• National Poll on Healthy Aging (NPHA), [United States], May 2019

The various waves of NPHA represent separate samples of participants and cannot be joined or merged.

From 2012 through 2016, MDRC, a non-profit research organization, conducted an evaluation of the scale-up effort of Success for All PowerTeaching in middle-school math. PowerTeaching, a structured cooperative learning program, was designed to do just that. The study was funded by an Investing in Innovation (i3) fund from the U.S. Department of Education. The expansion of PowerTeaching through an i3 grant offers the education field a unique opportunity to learn what it takes to help teachers create cooperative learning environments in their classrooms.

The Success for All PowerTeaching scale-up evaluation examines the PowertTeaching implementation and how it impacts five school districts over a two-year period (the 2014-2015 school year through the 2015-2016 school year). It also considers the scale-up process itself - the methods employed and the extent to which the Success for All Foundation (SFAF), the organization that developed and provides technical assistance to schools operating the program, achieved its scale-up goals.

The ten data files included in this study contain a range of variable information gathered from student-level test scores, teacher and school principal surveys, school achievement snapshots, teacher logs, and scale-up initiative evaluations. Key variables include district IDs, teacher and principal IDs, baseline and outcome standardized test scores, structural and instructional processes, and records of teacher logs. Demographic variables for students include information on race, gender, special education, free/reduced lunch eligibility, ELL status, and age.

This collection contains a cumulative datafile for The Los Angeles County Social Survey (LACSS) comprised of participants from years 1992 and 1994-1998. The LACSS continues the Los Angeles Metropolitan Area Studies (LAMAS) and the Southern California Social Surveys (SCSS). The Los Angeles County Social Survey (LACSS) is part of a continuing annual research project supported by the Institute for Social Science Research at the University of California, Los Angeles (UCLA). Each year a University of California researcher is given an opportunity to be principal investigator and to use a segment of the LACSS for his or her own research.

Data for this collection represents the LACSS conducted between February 1992 and June 1998. No data was included for the year 1993. Each year, Los Angeles County residents were asked questions concerning ethnic relations, social dominance, social distance, immigration, affirmative action, employment, and government. A split ballot methodology was utilized concerning the topics of immigration and affirmative action. Respondents were randomly selected to answer a series of questions from one of three ballots. In addition, a different series of social distance questions were asked depending on the respondent's ethnicity.

Demographic information collected includes race, gender, religion, age, education level, occupation, birth place, political party affiliation and ideology, and origin of ancestry.

The Los Angeles Metropolitan Area Studies [LAMAS] 6, 1973 collection reflects data gathered in 1973 as part of the Los Angeles Metropolitan Area Studies (LAMAS). The LAMAS, beginning in the spring of 1970, are a shared-time omnibus survey of Los Angeles County community members, usually repeated twice annually. The LAMAS were conducted ten times between 1970 and 1976 in an effort to develop a set of standard community profile measures appropriate for use in the planning and evaluation of public policy.

The LAMAS instruments, indexes, and scales used to track the development and course of social indicators (including social, psychological, health, and economic variables) and the impact of public policy on the community. Questions in this year of the LAMAS cover respondents' attitudes toward the following topics: air pollution, health care services in the community, local government politics, police relations, recreation and leisure time. In addition, participating researchers were given the option of submitting questions to be asked in addition to the core items. These additional question topics include: sleep habits, the true self, impact of computers, job seeking behavior, and mental health and psychological factors.

Demographic variables in this collection include sex, age, race, ethnicity, education, occupation, income, religion, marital status, birth place, and housing type.

The Los Angeles Metropolitan Area Surveys [LAMAS] 10, 1976 collection reflects data gathered in 1976 as part of the Los Angeles Metropolitan Area Surveys (LAMAS). The LAMAS, beginning in the spring of 1970, are a shared-time omnibus survey of Los Angeles County community members, usually repeated twice annually. The LAMAS were conducted ten times between 1970 and 1976 in an effort to develop a set of standard community profile measures appropriate for use in the planning and evaluation of public policy.

The LAMAS instruments, indexes, and scales were used to track the development and course of social indicators (including social, psychological, health, and economic variables) and the impact of public policy on the community. Questions in this survey cover respondents' attitudes toward the following topics: child abuse, parent-child relationships, right to privacy, and political participation. In addition, participating researchers were given the option of submitting questions to be asked in addition to the core items. These additional question topics include: accidents and emergencies, crime, and health care/relationship to doctors.

Demographic variables included in this dataset include age, marital status, religion, sex, education, occupation, income, geographic origin, and race.

The Los Angeles County Social Survey (LACSS) continues the Los Angeles Metropolitan Area Studies (LAMAS) and the Southern California Social Surveys (SCSS). The Los Angeles County Social Survey (LACSS) is part of a continuing annual research project supported by the Institute for Social Science Research at the University of California, Los Angeles (UCLA).

The LACSS 1995 was conducted between April and July 1995. Los Angeles County residents were asked questions concerning ethnic relations, social dominance, social distance, immigration, affirmative action, employment, and government. A split ballot methodology was utilized concerning the topics of immigration and affirmative action. Respondents were randomly selected to answer a series of questions from one of three ballots. In addition, a different series of social distance questions were asked depending on the respondent's ethnicity. Questionnaires were provided in both English and Spanish languages.

Demographic information collected includes race, gender, religion, age, education level, occupation, birth place, political party affiliation and ideology, and origin of ancestry.

The Los Angeles County Social Survey (LACSS) continues the Los Angeles Metropolitan Area Studies (LAMAS) and the Southern California Social Surveys (SCSS). The Log Angeles County Social Survey (LACSS) is part of a continuing annual research project supported by the Institute for Social Science Research at the University of California, Los Angeles (UCLA). Each year a University of California researcher is given an opportunity to be principal investigator and to use a segment of the LACSS for his or her own research. The 1992 principal investigator was Dr. Lawrence Bobo, who was an Associate Professor of Sociology at UCLA.

The LACSS 1992 was conducted between February and July 1992. Los Angeles County residents were asked questions concerning ethnic relations, social dominance, social distance, immigration, affirmative action, employment, and government. A split ballot methodology was utilized concerning the topics of immigration and affirmative action. Respondents were randomly selected to answer a series of questions from one of three ballots. In addition, a different series of social distance questions were asked depending on the respondent's ethnicity. Questionnaires were provided in both English and Spanish languages.

Demographic information collected includes race, gender, religion, age, education level, occupation, birth place, political party affiliation and ideology, and origin of ancestry.

The Los Angeles Metropolitan Area Surveys [LAMAS] 2, 1970 collection reflects data gathered in 1970 as part of the Los Angeles Metropolitan Area Surveys (LAMAS). The LAMAS, beginning in the spring of 1970, are a shared-time omnibus survey of Los Angeles County community members, usually repeated twice annually. The LAMAS were conducted ten times between 1970 and 1976 in an effort to develop a set of standard community profile measures appropriate for use in the planning and evaluation of public policy.

The LAMAS instruments, indexes, and scales were used to track the development and course of social indicators (including social, psychological, health, and economic variables) and the impact of public policy on the community. Questions in this survey cover respondents' attitudes toward the following topics: air pollution, health care services in the community, local government politics, police relations, recreation, and leisure time. In addition, participating researchers were given the option of submitting questions to be asked in addition to the core items. These additional question topics include: sleep habits, the true self, impact of computers, job seeking behavior, and mental health and psychological factors.

Demographic variables included in this dataset include age, marital status, religion, sex, education, income, geographic origin, and race.

The Los Angeles Metropolitan Area Surveys [LAMAS] 1, 1970 collection features data gathered in 1970 as part of the Los Angeles Metropolitan Area Surveys (LAMAS). The LAMAS, beginning in the spring of 1970, are a shared-time omnibus survey of Los Angeles County community members, usually repeated twice annually. The LAMAS were conducted ten times between 1970 and 1976 in an effort to develop a set of standard community profile measures appropriate for use in the planning and evaluation of public policy.

The LAMAS instruments, indexes, and scales were used to track the development and course of social indicators (including social, psychological, health, and economic variables) and the impact of public policy on the community. Questions in this survey covered respondents' attitudes toward the following topics: air pollution, health care services in the community, local government politics, police relations, recreation, and leisure time. In addition, participating researchers were given the option of submitting questions to be asked in addition to the core items. Additional question topics included: politics in general, mobility, housing, schools, segregation, and social attitudes and opinions.

Demographic information collected includes age, race, sex, religion, marital status, education, income, and geographic origin.

The Los Angeles County Social Survey (LACSS) continues the Los Angeles Metropolitan Area Studies (LAMAS) and the Southern California Social Surveys (SCSS). The LACSS is part of a continuing annual research project supported by the Institute for Social Science Research at the University of California, Los Angeles (UCLA). Each year a University of California researcher is given an opportunity to be principal investigator and to use a segment of the LACSS for his or her own research.

The LACSS 1994 was conducted between April and July of 1994. Los Angeles County residents were asked questions concerning their attitudes and views of living in Los Angeles, the economy, neighborhoods, public services, and political views. It also includes segments regarding views on immigration, hiring practices, and ethnic identity and relations. A split ballot methodology was utilized concerning topics of affirmative action and immigration. Respondents were randomly selected to answer a series of questions from one of two ballots concerning economic conditions; and three ballots about ethnic relations. Questionnaires were provided in both English and Spanish languages.

Demographic information collected includes race, gender, age, religion, political party affiliation and ideology, education level, occupation, birth place, and origin of ancestry.

The Professional Development Study (PDS) is a randomized controlled evaluation of two forms of professional development delivered to over 490 early childhood education teachers: (1) coursework on effective instructional interactions (as defined by the Classroom Assessment Scoring System [CLASS], an observational measure with established links to child outcomes) and (2) video-based consultation support through MyTeachingPartner (MTP). These professional development supports aim to improve teachers' implementation of language/literacy activities and interactions with children, as well as promote gains in children's social and academic development.

The questionnaires and measures used to gather the study data were initially compiled into 76 Raw-level files. The Raw-level data were in turn used by the research team at NCRECE to create 10 comprehensive Analysis-level files in order to avoid any inaccuracies that might result from incorrectly merging the Raw files. The Analysis-level files are organized by participant and phase of study. Whenever possible, Analysis files should be utilized instead of merging individual Raw files.

Additional information about this study can be found at the NCRECE web site.

This study is part of the American National Election Study (ANES), a time-series collection of national surveys fielded continuously since 1952. The American National Election Studies are designed to present data on Americans' social backgrounds, enduring political predispositions, social and political values, perceptions and evaluations of groups and candidates, opinions on questions of public policy, and participation in political life. The 2008 ANES data consists of a time series study conducted both before and after the 2008 presidential election in the United States. It entailed both a pre-election interview and a post-election re-interview. A freshly drawn cross section of the electorate was taken, yielding 1,212 cases. Like its predecessors, the 2008 ANES was divided between questions necessary for tracking long-term trends and questions necessary to understand the particular political moment of 2008. The study maintains and extends the ANES time-series 'core' by collecting data on Americans' basic political beliefs, allegiances, and behaviors: aspects of political belief and action so basic to the understanding of politics that they are monitored at every election, no matter the nature of the specific campaign or the broader setting. The study also carried topical and study-specific instrumentation. Questions covering issues prominent in 2008 addressed job outsourcing, private investment of Social Security funds, and President Bush's tax cut. Americans' views on foreign policy, the war on terrorism, and the Iraq War and its consequences were also addressed. In addition, the study carried expanded instrumentation on inflation, immigration, gender politics, and gay and lesbian politics. It also extended the experiment on the measurement of voter turnout that began in 2002. Demographic variables include respondent age, education level, political affiliation, race/ethnicity, marital status, and family composition.

Additional information about the ANES time series collection can be found on the American National Election Study (ANES) Web site.

The TAZAMA Health and Demographic Surveillance System (HDSS) study site is located in the Kisesa and Bukandwe rural electoral wards in the Magu district of the Mwanza Region in Northern Tanzania. The two wards are comprised of six villages. There is one health center and five dispensaries (3 public and 2 private) in the study area. The two wards have eleven government primary schools (at least one in each village) and two secondary schools. Both Mwanza city and Magu town are accessible to residents; buses run along the main road and take about an hour and a half to get to Mwanza. Most of the residents are subsistence farmers; a lot of surplus agricultural produce is traded in Mwanza, which is Tanzania's second city. In the year 2012, the research study covered a population of about 30,000 people who live in the Kisesa and Bukandwe wards. The majority of the residents (about ninety five per cent) belong to the Sukuma ethnic group.

The DSS collects information on births and deaths and movements in and out of the households. It helps researchers to understand the population dynamics in the study area including fertility, mortality and migration patterns. It provides information on the structure of families that live together. The DSS study is also used to identify people who are eligible to participate in the serological surveys (the right age group, and continuously resident rather than just visiting). It provides the data for calculating the denominators for demographic rates.

The objectives of this study are as follows: (1) to improve understanding of the dynamics of the HIV epidemic; (2) to assess the demographic, social and economic impacts of the HIV/AIDS epidemic; (3) to evaluate the effects of national prevention, treatment and care interventions as implemented in Kisesa Ward; (4) to measure child and adult mortality and fertility in the general population and by HIV status; (5) to asses the leading causes of death through verbal autopsy; (6) to assess changes in the family structure due to HIV epidemic; and (7) to provide reliable data for district health planning.

This study is part of the American National Election Study (ANES), a time-series collection of national surveys fielded continuously since 1952. The American National Election Studies are designed to present data on Americans' social backgrounds, enduring political predispositions, social and political values, perceptions and evaluations of groups and candidates, opinions on questions of public policy, and participation in political life. The 2008 ANES data consists of a time series study conducted both before and after the 2008 presidential election in the United States. It entailed both a pre-election interview and a post-election re-interview. A freshly drawn cross section of the electorate was taken, yielding 1,212 cases. Like its predecessors, the 2008 ANES was divided between questions necessary for tracking long-term trends and questions necessary to understand the particular political moment of 2008. The study maintains and extends the ANES time-series 'core' by collecting data on Americans' basic political beliefs, allegiances, and behaviors: aspects of political belief and action so basic to the understanding of politics that they are monitored at every election, no matter the nature of the specific campaign or the broader setting. The study also carried topical and study-specific instrumentation. Questions covering issues prominent in 2008 addressed job outsourcing, private investment of Social Security funds, and President Bush's tax cut. Americans' views on foreign policy, the war on terrorism, and the Iraq War and its consequences were also addressed. In addition, the study carried expanded instrumentation on inflation, immigration, gender politics, and gay and lesbian politics. It also extended the experiment on the measurement of voter turnout that began in 2002. Demographic variables include respondent age, education level, political affiliation, race/ethnicity, marital status, and family composition.

Additional information about the ANES time series collection can be found on the American National Election Study (ANES) Web site.

The ethnographic fieldwork portion of the project - interviews with women of reproductive age, and when available their partners and mothers - was initiated and completed in 2006. For each of four Italian cities (Padua, Bologna, Cagliari, and Naples) studied ethnographically by trained anthropologists, both a working-class and a middle-class neighborhood were identified. These interviews (349 in number) have been transcribed without identifiers. All interviews have been coded and assigned 'attributes' (or nominative variables, such as gender, civil/religious status of marriage, etc.) using the qualitative data analysis software (NVIVO), and these reside in secure electronic project folders. This large body of qualitative interview data is now complete and ready for use across the international collaborative units. Preliminary research reveals the particular significance of family ties in Italy, the fundamental role played by gender systems, and the specific cultural, socio-economic, and politic contexts in which fertility behavior and parenting are embedded.