The SDR Project creates a multi-country multi-year database by reprocessing extant survey and non-survey data. The core of the SDR database is information pooled from 24 international survey projects: we select 3733 national samples of 187 project-waves (see here for details on survey data). Next to substantive target variables, we construct two types of metadata – control variables dealing with different aspects of the quality of the source surveys, and the process of ex-post harmonization, respectively. Survey data are complemented with macro-level variables from non-survey sources describing the social, economic and political environment (e.g. population, GDP per capita, Freedom House Index, Gini coefficient) measured at the country-year level.

Substantive target variables in the SDR database cover respondents’:

(1) socio-demographics;

(2) political engagement, including interest in politics, voting, and protest behavior;

(3) trust in political institutions;

(4) social capital (generalized social trust and membership in organizations);

(5) self-reported health, life satisfaction and happiness.

The SDR database spans the period 1966-2017 and includes information on a total of ca. 142 countries. It extends the SDR database v 1.0, which the NCN Harmonization Project produced.

The SDR Master Box version 1.0, which comprises the database and its documentation, is available via Dataverse.

A first version of the SDR Project’s portal with online access to initial tools for subsetting the SDR database v. 1.0, is available here.