The problem of estimating the unknown support G [ belong ] [ R^N ] of a uniform density is considered under the assumption that the support G belongs to the class of "boundary fragments" with smooth upper surface. The minimax lower bounds for the accuracy of arbitrary estimators of G are...

The explanation of productivity differentials is very important to identify the economic conditions that create inefficiency and to improve managerial performance. In literature two main approaches have been developed: one-stage approaches and two-stage approaches. Daraio and Simar (2003)...

The Malmquist Productivity Index (MPI) suggests a convenient way of measuring the productivity change of a given unit between two consequent time periods. Until now, only static approach for analyzing the MPI was available in the literature. However, this approach hides a potentially valuable...