The European Social Survey (ESS) is a comparative survey conducted in Europe since 2001. The periodicity of the survey is biennial and each cycle is called Round. Every two years, data collection takes place in about thirty European countries through face-to-face interviews on representative samples of the respective populations.

Realization of data collection and acquisition services for the conduct in Italy of Round 11 of the European Social Survey sample survey. The European Social Survey (ESS) is a comparative survey conducted in Europe since 2001. The periodicity of the survey is biennial and each cycle is called Round. Every two years, data collection takes place in about thirty European countries through face-to-face interviews on representative samples of the respective populations.