Combining observations in a variable

[Adithya Kolloju]

Hello everyone,
I have panel data from 2001 to 2020 where I want to combine certain observations as shown below

Associate
Associate confirmed
Associate not confirmed
Researchers
Researchers A
Researchers B
Researchers tenured
Researchers non-tenured
Ordinary professors
Full professors
Extraordinary professors

Here each observation has a panel dataset from 2001 to 2020 with various universities. I want to combine observations with years and university names. something summing up like: Associate (Associate, the associate confirmed, and Associate not confirmed), likewise with other observations.
Is there any solution for this?

Thank you.

[Fei Wang]

Adithya, could you show some concrete examples? What does your dataset look like now and what would you like the data to become? I am not able to understand the meaning of "combine observations with years and university names". Also please read FAQ of the forum and use -dataex- to show your data examples.