We suggest a robust form of conditional moment test as a constructive test for functional misspecification in multiplicative error models. The proposed test has power solely against violations of the conditional mean restriction but is not affected by any other type of model misspecification....

In this paper a post-sample prediction test is derived forestimators based on the Efficient Method of Moments. The mainadvantage of this particular test over other stability tests isthat no time-consuming estimation of the structural parameters forthe post-sample is needed. The asymptotic...

Estimation using simulation techniques may be very time consuming. Specification tests for structuralstability often require more than one of such computationally demanding estimators. Typically one for thesample, one for the post-sample and one for the combination of sample and post-sample is...