We construct a simple information matrix misspecification test for exponential distributions that can be applied in duration models. We evaluate the test performance using Monte Carlo simulation experiments. We found good empirical size properties and good power against Weibull and Gamma...

This paper compares the power and size of both spatial one-directional and robust to local misspecification LM test using Monte Carlo techniques under different set ups. Confirming the results found in Anselin et al. (1996), under local misspecification the robust LM test improves its size and...