I am running a pooled OLS regression for my thesis. My adjusted r square is 0.74 which is quite high compared to other published studies. I have checked for normality of residuals, serial correlation and homoscedasticity. All the 3 tests meet the conditions for OLS. Should I be concerned about the high adjusted r square? Is there any test I could do to know whether the regression model has no other flaws?
The adjusted R square is what it is. Differences with other published studies cold be due to differences in the data and/or the predictor variables.