Is it possible to do the random effect and the fixed effect in the PPML? if yes What is the procedure in R?

05 November 2019 0 10K Report

Hello, I am studying the determinants of Ivorian exports. Given the presence of zero flow in my database I have opted for an estimation of my parameters by the PPML technique... Is it necessary to do a haussman test for the validity of my model for the panel I am studying... If so how to do such a procedure on R by doing the random effect and the fixed effect in the PPML?

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