EVS 2008 method report : documentation release 2016/12/29 : related to the integrated datasets, GESIS study-No. ZA4800, version: 4.0.0, doi:10.4232/1.12458, GESIS study-No. ZA4799, version: 1.0.0, doi:10.4232/1.12483 / European Values Study and GESIS Data Archive for the Social Sciences