 This merged file contains the items from the core questionnaire for all the countries included in the 2006 round of surveys. County- specific items are excluded.  The files also contain a variable called “WEIGHT1500â€ that makes each country file weighted to a sample size of 1,500 so that no one country would count any more than any other in a comparative analysis. In the SPSS version of these data sets, the weight variable should be activated. In STATA the weight variable can be activated through the command svy setting: svyset upm [pw=wt], strata (estratopri) or should be specified for other commands.