The probability that a services procurement undertaken by the Spanish Armed Forces becomes null and void is analyzed, as well as the winning bid in the case of procurements which were awarded. To do this, a sample selection model is estimated using data compiled from the Public Sector...

The probability that a services procurement undertaken by the Spanish Armed Forces becomes null and void is analyzed, as well as the winning bid in the case of procurements which were awarded. To do this, a sample selection model is estimated using data compiled from the Public Sector...

This article is the first working paper of the Researching Center for Agricultural Sciences and Applied Economic. It is a contribution for the INTA Nicaragua.

In this paper, our research question that could analyze how efficiency in Swedish financial enterprises has changed since the banking crisis in 1993. We estimate the time-invariant and time-variant efficiencies of Swedish financial enterprises with four different estimators. These estimators are...