This paper considers the problem of identification, estimation and inference in the case of spatial panel data models with heterogeneous spatial lag coefficients, with and without (weakly) exogenous regressors, and subject to heteroskedastic errors. A quasi maximum likelihood (QML) estimation...

The paper is concerned with the question whether the pricing of U.S. stocks has been efficient according to the present value model. We extended the MTAR-model used in the context of market efficiency using a rolling window estimation strategy. This rolling MTAR-analysis revealed that the...