Integrated values surveys 1981-2014

The European Value Study (EVS) and the World Value Survey (WVS) are two large-scale, cross-national and longitudinal survey research programs. They include a large number of questions, which have been replicated in the 364 surveys both programs conducted from 1981 to 2014.

The EVS is being processed by the University of Tilburg and GESIS Leibniz Institute for the Social Sciences in Cologne, the WVS by ASEP/JDS in Madrid. Each group, EVS, and WVS has constructed a longitudinal data file from their waves to facilitate time series analysis. The data and accompanying documentation on the longitudinal data files are provided through the EVS website and the WVS website, respectively.

The trend variables and data have been harmonized using a common dictionary agreed by EVS and WVS. This allows for constructing an Integrated Values Surveys 1981-2014 data file including the four waves of the EVS (1981-2008) and the six waves of the WVS (1981-2014). The resulting file will cover surveys conducted in 113 countries/regions of the waves 1981-1984, 1989-1993, 1994-1998, 1999-2004, 2005-2009, and 2010-2014. It will consist of 1.427 variables and 506.268 cases.

Both projects agreed to provide up-to-date information and assistance to users so that they can merge the longitudinal data files easily.

Information on the resulting Integrated Values Survey 1981-2014 is provided here.
It covers User information, Conditions of Use, and Information on included data files.

For an overview of countries participating in EVS/WVS waves 1981-2014 see: Excel-FilePDF-File.

The steps for building an Integrated Values Surveys 1981-2014 data file are:
    1. Download the EVS and WVS data files and documentation.
      EVS Longitudinal Data File 1981-2008, study no. ZA4804: release v.3.1.0 as of April 8, 2020, doi:10.4232/1.13486
      Please go to the GESIS Data Catalogue and download the data file and documentation.
      World Value Survey official 6 wave aggregate 1981-2014, v.20150418, 2015
      Please go to the WVS website, section Download Survey Data Files and download the data and documentation.
    2. Merge both data files
      Open the EVS Longitudinal file and merge (add cases) the WVS file, or vice versa. The add cases command varies depending on the statistical program (use ADD FILES from SPSS, APPEND command for STATA).
Bibliographic citation of data

Publications based on the Integrated Values Surveys 1981-2014 should acknowledge this by means of bibliographic citations. To ensure that such source attributions are captured for social science bibliographic utilities, citations must appear in the footnotes or in the reference section of publications. Please add citations for both files included in the Integrated Value Surveys 1981-2014:

EVS (2015): European Values Study Longitudinal Data File 1981-2008 (EVS 1981-2008). GESIS Data Archive, Cologne. ZA4804 Data file Version 3.1.0, doi:10.4232/1.13486.

WVS (2015). World Value Survey 1981-2014 official aggregate v.20150418, 2015. World Values Survey Association ( Aggregate File Producer: JDSystems, Madrid.