I am working on a long panel data set with N=34 and T=132. I need to extract fixed effects from plm (within) model and estimation of the same model but including dummies for individuals (N-1) in OLS. However, I do not get the same fixed effects for my individuals from plm (within) and dummy variable model. All the other parameters that I get are exactly the same. Can somebody help me with any possible reasons for this problem please?