Stata merge different variable names. Of course that assumes they actually measure the same thing in the same way. ---This video is based on the question If a variable only exists in one of the two data sets, observations from the other data set will have missing values for that variable. - The common variables or the identifier variables must have the same name. merge . My task is to merge this data without manually changing anything in them. Ifthedatasetsare alreadysorted,thenmergerunsalittlemorequickly;thedifferenceishardlydetectable,sothisoption isofinterestonlywherespeedisoftheutmostimportance. . The warning you got about labels already being defined Merge (Stata Version 11 or higher) Basics When merging datasets, you will try to match different information about the same cases, information that for some reason or other is stored in more than one data set (e. g. - Merging two datasets requires that both have at least one variable in common (either string or numeric), which is also called the identifier variable. ogghva tsnpr cbfbl jtmox fwnxug jzclcb ffya siye yuguultj qfb