I am trying to merge 3 data sets from Add-Health: main data set, sibling data set and pairs data set. The main and sibling data sets are monatic and the paris data set is dyadic. The main and sibling data sets both have an ID variable (AID) and the pairs data set has the same sample, but their ID variables are AID_1 and AID_2. I am trying to merge the paris data onto the siblint data doing a m:1 merge but get error messages such as:
ID does not uniquely identify the variable or other error messages.
Does anyone have any suggestions about how merge these three data sets by unique ID? Any help would be appreciated. Thank you.
ID does not uniquely identify the variable or other error messages.
Does anyone have any suggestions about how merge these three data sets by unique ID? Any help would be appreciated. Thank you.