The Dutch drinking water sector experienced two drastic changes over the last 10 years. Firstly, in 1997, the sector association started with a voluntary benchmarking aimed to increase the efficiency and effectiveness of the sector. Secondly, merger activity arose. This paper develops a tailored nonparametric model to dissect and distinguish the effects on efficiency of these two evolutions. In particular, we adapt Free Disposal Hull (FDH) to estimate robust and conditional non-oriented efficiency estimates. Parametric COLS (Fourier) tests show the robustness of the model with respect to the specification and its variables. We classify the merger economies into scale economies and increased incentives to fight inefficiencies. Although we detect a significant efficiency enhancing effect of benchmarking, we find insignificant merger economies due to the absence of scale economies and the absence of increased incentives to fight inefficiencies.

Additional Metadata
Keywords efficiency, mergers and acquisitions, non-parametric and parametric estimation, scale economies, water sector
JEL Estimation (jel C13), Semiparametric and Nonparametric Methods (jel C14), Production and Organizations: General (jel D20), Gas Utilities; Pipelines; Water Utilities (jel L95)
Publisher Tinbergen Institute
Persistent URL
de Witte, K, & Dijkgraaf, E. (2007). Mean and Bold? (No. TI 2007-093/2). Discussion paper / Tinbergen Institute. Tinbergen Institute. Retrieved from