Merge

[Bedasa Merga]

I want to merge two datasets but the id does not uniquely identify observations in both datasets

[Clyde Schechter]

There are several possibilities, with different resolutions. You need to show example data from both data sets, and explain what the common variables are that link them. You also need to show what you want the combined result to look like.

To show the example data, please use the -dataex- command. If you are running version 18, 17, 16 or a fully updated version 15.1 or 14.2, -dataex- is already part of your official Stata installation. If not, run -ssc install dataex- to get it. Either way, run -help dataex- to read the simple instructions for using it. -dataex- will save you time; it is easier and quicker than typing out tables. It includes complete information about aspects of the data that are often critical to answering your question but cannot be seen from tabular displays or screenshots. It also makes it possible for those who want to help you to create a faithful representation of your example to try out their code, which in turn makes it more likely that their answer will actually work in your data.