errors. Our residual-based GMM t-test (hereafter: t-test) differs from the m2 and Sargan's over-identifying restriction … that is applicable to dynamic panel data models with serially correlated errors. Our residual-based GMM t-test (here- after …: Dynamic panel data; Residual based GMM t-test; m2 and Sargan tests ∗ This paper was presented at the annual meeting of the COE …