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...some panel regressions with R. Therefore I have combined several time periods of data for different individuals in my database. I have already run pooled OLS but I would need to calculate a Fixed Effects Estimator (within estimator). Unfortunately I couldn't find anything like that in the RSearch and I suppose that lme (in package nlme) is not the answer. Is there any defined function to calculate panel data estimators like Fixed Effects Estimators (within), a between estimator or a Random Effects estimator. For more details on the estimators I would like to use see: Cameron, A. C.; Tr...