This paper considers the extension to panel data of models that are specified cross-sectionally in terms of a likelihood. It considers specifically the estimation of stochastic frontier models but the same issue arises in many other models. The model can be estimated for any single value of the...

This paper is an empirical study of the uncertainty associated with estimates from stochastic frontier models. We show how to construct confidence intervals for estimates of technical efficiency levels under different sets of assumptions ranging from the very strong to the relatively weak. We...

When there are more moment conditions than observations, the usual GMM weighting matrix is singular. We show that using the generalized inverse is not a good idea. With continuous updating, the criterion function equals one for every parameter value.

Durch das Interesse deutscher Unternehmen an einer weltweit einheitlichen Aktie hat sich in letzter Zeit eine Umstellung auf die Namensaktie durchgesetzt. Diese Entwicklung beruht einerseits auf der Verbesserung des Abwicklungssystems CASCADE RS der Clearstream Banking AG, Frankfurt am Main...