Integrated Values Surveys 1981-2021

The European Value Study (EVS) and the World Value Survey (WVS) are two large-scale, cross-national and repeated cross-sectional survey research programmes. They include a large number of questions, which have been replicated since the early eighties.

The IVS is constructed from the EVS and WVS trend files
Both organisations have agreed on a new structure for the current EVS and WVS trend files. Based on this, the EVS archive (GESIS) has been responsible for generating the EVS Trend File 1981-2017, and the WVS archive (JDS Madrid) has been responsible for generating the WVS Time-Series 1981-2020. From the two trend files, it is easy for data users to construct the Integrated Values Surveys 1981-2021 data file, which contains the five waves of the EVS and the seven waves of the WVS.

Source data files

  • EVS (2021): EVS Trend File 1981-2017. GESIS Data Archive, Cologne. ZA7503 Data file Version 2.0.0, doi:10.4232/1.13736.
  • Haerpfer, C., Inglehart, R., Moreno, A., Welzel, C., Kizilova, K., Diez-Medrano J., M. Lagos, P. Norris, E. Ponarin & B. Puranen et al. (eds.). 2021. World Values Survey Time-Series (1981-2020) Cross-National Data-Set. Madrid, Spain & Vienna, Austria: JD Systems Institute & WVSA Secretariat. Data File Version 2.0.0, doi:10.14281/18241.15.

EVS and WVS distribute the trend files through their website and retrieval systems. Thus, regular information on the source data files and documentation, errata and version history, and documentation are provided on the EVS website and the WVS website.

The new concept of the EVS and WVS trend files
A new approach has been agreed to transform the former large EVS and WVS longitudinal data files, which contained almost all variables of the EVS and WVS waves respectively, into leaner and easier-to-use files. Both EVS and WVS trend files are based on the updated Common EVS/WVS Dictionary (v.2021). It contains only those variables/questions that have been replicated by EVS and/or WVS since the early 1980s. To identify the trend variables within EVS or WVS and across both projects, two inclusion requirements were agreed:

  • According to requirement 1, all variables that have been used at least twice in the EVS or twice in the WVS are included in the respective EVS or WVS trend file.
  • According to requirement 2, all variables that have been used at least once in the EVS and once in the WVS are included in the respective EVS or WVS trend file.

The Common EVS/WVS Dictionary (2021) gives an overview of the EVS and WVS variables included in the Integrated Values Surveys 1981-2021 constructed after merging the EVS and WVS trend files. It informs about the correspondence of the variables to the five EVS waves and seven WVS waves as well as their compliance with the agreed inclusion requirements mentioned above.

The content of data files and the relation between them is depicted in the following table.

Composition of the IVS 1981-2021

 

IVS EVS Trend File WVS Trend File

Field work period

1981-2021

1981-2020

1981-2020

Number of waves

7

5

7

Number of cases

645.249

223.099

422.150

Number of variables

838

635

728

Countries and territories

115

49

104

Number of surveys

450

159

291

Building the IVS 1981-2021

(1) Download the EVS and WVS data files and documentation from the EVS/GESIS and WVS websites.

(2) Download the syntax in the format you need (SPSS or STATA) and merge the two trend files to generate the IVS 1981-2021.

  • IVS Merge Syntax v1 (SPSS) or
  • IVS Merge Syntax v1 (STATA)

Documentation related to the IVS 1981-2021

Publications based on the IVS 1981-2021 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 IVS 1981-2021.

  • EVS (2021): EVS Trend File 1981-2017. GESIS Data Archive, Cologne. ZA7503 Data file Version 2.0.0, doi:10.4232/1.13736.
  • Haerpfer, C., Inglehart, R., Moreno, A., Welzel, C., Kizilova, K., Diez-Medrano J., M. Lagos, P. Norris, E. Ponarin & B. Puranen et al. (eds.). 2021. World Values Survey Time-Series (1981-2020) Cross-National Data-Set. Madrid, Spain & Vienna, Austria: JD Systems Institute & WVSA Secretariat. Data file Version 2.0.0, doi:10.14281/18241.15.

Please send your bibliographic citation based on the IVS 1981-2021 at