File: Test variables (MTMM), edition 3.0, round 9
Users of data are obliged to read the ESS Conditions of use
Please note! Weights must be applied
In general, you must weight tables before quoting percentages from them. The Design weights (DWEIGHT) adjust for different selection probabilities, while the Post-stratification weights (PSPWGHT) adjust for sampling error and non-response bias as well as different selection probabilities. Either DWEIGHT or PSPWGHT must always be used. In addition, the Population size weights (PWEIGHT) should be applied if you are looking at aggregates or averages for two or more countries combined. See the guide Weighting European Social Survey Data for fuller details about which weights to use.