Hello everyone,
actually I got a comment from the journal, I did not understand what the difference between OLS and panel regression.
the comment says ((The authors are using OLS as a baseline methodology, but your time period is from 2009 2015, I suggest that the authors could conduct panel regression as it accounts for individual specific heterogeneity.))

please someone helps, I want to know the difference and how to apply Panel regression.

thanks in advance
Alkebsee