Dear Statas,

I have 7 datasets of the same study with the same variable names but differing content of these variables.
My problem: For example, the first data set has 227 variables, the second one 323 variables and they are all named v1, v2, v3 etc. even though those stand for different things in each data set. And when I append them only the 96 variables that are more from the second data set are added. How can I manage to append the full data set? Do I maybe have to create categories (e.g. year) where I can add the certain variables?

Thank you for your help!