The first edition of test data (edition 1.0) from supplementary questionnaire for ESS round 4 was released on September 28 2010.

Edition 1.0 includes Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Israel, Latvia, Netherlands, Norway, Poland, Portugal, Romania, Russia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey, Ukraine, United Kingdom.

The first edition of data from contact forms for ESS round 4 is now available for download.

Edition 1.0 includes Belgium, Bulgaria, Switzerland, Cyprus, Czech Republic, Germany, Denmark, Estonia, Spain, Finland, France, United Kingdom, Greece, Hungary, Israel, Netherlands, Norway, Poland, Portugal, Romania, Russian Federation, Sweden, Slovenia and Slovakia.

The third edition of data and documentation for ESS round 4 was released 24.03.10. Edition 3.0 includes Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Israel, Latvia, Netherlands, Norway, Poland, Portugal, Romania, Russian Federation, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey, Ukraine and United Kingdom. Parents' occupation files and interviewer data files have also been released for the countries included in edition 3.0 of the main data file (listed above). ESS round 4 includes rotating modules on the topics: Welfare attitudes in a changing Europe and Experiences and Expressions of Ageism. 

The ESS Data and Documentation section has been updated with a cumulative data file for the first eight rounds of the ESS. The cumulative data are available from the ESS Cumulative Data Wizard, where users can customise their own subsets of data in different formats. The ESS Cumulative Data Wizard gives access to cumulative data from countries that have been included in the integrated ESS files in two or more rounds. All variables that have been asked in more than one round are included in the cumulative data file.