Nonparametric estimators are widely used to estimate the productive efficiency of firms and
other organizations, but often without any attempt to make statistical inference. Recent work …

A rich theory of production and analysis of productive efficiency has developed since the
pioneering work by Tjalling C. Koopmans and Gerard Debreu. Michael J. Farrell published …

In this work, we analyze the performance of production units using the directional distance
function which allows to measure the distance to the frontier of the production set along any …

This study applies a nonparametric model to estimate the eco-efficiency across the US
states over the period 1990–2017. To capture the environmental damage caused by …

A major aim in recent nonparametric frontier modeling is to estimate a partial frontier well
inside the sample of production units but near the optimal boundary. Two concepts of partial …

Estimation of support frontiers and boundaries often involves monotone and/or concave
edge data smoothing. This estimation problem arises in various unrelated contexts, such as …

Over the last few years the literature on social capital and bank efficiency analysis has
expanded rapidly. We merge them by analysing how social capital affects bank efficiency in …

The aim of this study is to provide a tool which enables us to conduct statistical analysis in
the context of changes in productivity and profit. We build on previous initiatives to …

The package npbr is the first free specialized software for data edge and frontier analysis in
the statistical literature. It provides a variety of functions for the best known and most …

In the econometric literature on the estimation of production technologies, there has been
considerable interest in estimating so called cost frontier models that relate closely to …