Recent Publications

This paper introduces a decomposition of the additively complete Luenberger-Hicks-Moorsteen Total Factor Productivity indicator into the usual components: technical change, technical inefficiency change and scale inefficiency change. Our approach is general in that it does not require differentiability or convexity of the production technology. Using a nonparametric framework, the empirical application focuses on the agricultural sector at the state-level in the U.S. over the period 1960-2004. The results show that Luenberger-Hicks-Moorsteen productivity increased substantially in the considered period. This productivity growth is due to output growth rather than input decline, although the extent depends on the convexity assumption of the technology. Technical change is the main driver, while the role of technical inefficiency change and scale inefficiency change also depends on the convexity assumption of the technology.
European Journal of Operational Research, 260(1): 359-375, 2017

This paper introduces a nonparametric measure of coordination productivity growth where the subprocesses are explicitly modelled in the production technology. The coordination productivity indicator is decomposed into a coordination technical inefficiency change component and a coordination technical change component. This decomposition allows assessment of reallocation impacts on the different sources of productivity growth. The empirical application focuses on a large panel of English and Welsh farms over the period 2007-2013. The results show that coordination inefficiency significantly increases with the proportion of resources allocated to livestock production in economic and statistical terms. Coordination inefficient farms should generally allocate more land to crop production. Depending on the region, the average coordination productivity growth ranges from -9.7% to 15.9% per year. It is driven by coordination technical change rather than coordination inefficiency change.
Journal of Agricultural Economics, 67: 779-798, 2016

Work in progress

Working papers:

  1. “Production with storable and durable inputs: nonparametric analysis of intertemporal efficiency” (with Laurens Cherchye & Bram De Rock), R&R at European Journal of Operational Research

Current work in progress:

Efficiency and productivity analysis

  1. “The dynamic Luenberger-Hicks-Moorsteen productivity indicator with an application to dairy farms in South West England” (with Frederic Ang)
  2. “Exact and superlative measurement of Luenberger-Hicks-Moorsteen productivity” (with Frederic Ang)

Consumption analysis

  1. “Individual welfare analysis for collective households” (with Laurens Cherchye, Sam Cosaert, Bram De Rock & Frederic Vermeulen)
  2. “What can choices reveal about product characteristics? Gorman revisited.”


  1. “Benefit-of-the-doubt performance measurement of social enterprises: mission lock-in or mission drift?” (with Johan Bruneel, Laurens Cherchye & Matthias Staessens)
  2. “A DEA-based methodology to determine customer value” (with Laurens Cherchye, Bram De Rock, Bart Dierynck & Filip Roodhooft)



I keep a repository with useful MATLAB utility functions that intend to make MATLAB programming just that more easy.


Nonparametric Efficiency and Productivity Analysis for Julia. A toolbox for doing efficiency analysis and computing productivity change using nonparametric techniques.


NonParametric Regression Laboratory for MATLAB (NPRLab) is a MATLAB toolbox for nonparametric regression. In particular, it implements a variety of linear estimators. Data rescaling and bandwidth tuning is done automatically by the software. Finally, the toolbox also features confidence interval estimation by the volume-of-tube formula both in a one-dimensional and multi-dimensional setting.


This academic year I am a daily advisor for 1 master thesis student. In the past, I was a daily advisor for 2 individual master thesis students and 1 group of 5 master thesis students.

I am also the teaching assistant for the module Seminarie methoden voor economische analyse in the 2nd semester.

Recent Posts

Peer reviewed publications



  • pieterjan dot kerstens at kuleuven dot be
  • +3216330765
  • Etienne Sabbelaan 53, 8500 Kortrijk, Belgium