This paper deals with first-best and second-best congestion pricing of a stylised two-link network with probabilistic route choice of travellers. Travellers may have heterogeneous values of travel times and may differ in their idiosyncratic route preferences. We derive first-best and second-best...

Pesticide use in agriculture poses several risks to both human health and non-target agro-ecosystems. Due to lack of information on the monetary value of reducing pesticide risks, it is difficult to perform an economic analysis that addresses social efficiency of policy and draws conclusions...

The widespread use of pesticides in agriculture provides a particularly complex pattern of multidimensionalnegative side-effects, ranging from food safety related effects to the deterioratian of farmland ecosystems.The assessment of the economic implications of such negative processes is fraught...

This discussion paper resulted in a publication in the <A href="http://www.sciencedirect.com/science/article/pii/S0014292112001493">'European Economic Review'</A> 2013, 58, 31-57.<P> In this paper, we use a recent policy change in the Netherlands to study how changes in search requirements for the older unemployed affect their transition rates to employment, early retirement...</p></a>

The present paper addresses the dynamics of innovation, by extending the analysis beyond a static-economic perspective. It offers a dynamic-institutional mapping of relational capacities to dynamically innovate. Its main goal is to contribute to the above-mentioned research theme by presenting a...

This paper examines the empirical analysis of treatment effects on duration outcomes from data that contain instrumental variation. We focus on social experiments in which an intention to treat is randomized and compliance may be imperfect. We distinguish between cases where the treatment starts...

This paper provides new estimates of the impact of the French tax credit on the employment outcomes of women. We model simultaneously the employment probability and the determinants of programme eligibility. We improve on earlier studies in this field that, using a single evaluation equation...

There is a growing interest in extending project evaluation methods to the evaluation of programs: complex interventions involving multiple activities. In general a program evaluation cannot be based on separate evaluations of its components since interactions between the activities are likely...

This discussion paper resulted in an article in the 'Journal of Industrial Economics' (2014). Volume 62, issue 3, pages 467-502.<P> Where markets are insufficiently competitive, governments can intervene by auctioninglicenses to operate or by forcing divestitures. The Dutch government has...</p>

This discussion paper led to a publication in <A href="http://onlinelibrary.wiley.com/doi/10.1111/j.1542-4774.2010.01002.x/abstract">'Journal of the European Economic Association'</A>, 9(1), 106-29.<p>This paper investigates the effects of intensified screening of disability insurance benefit applications. A large-scale experiment was setup where in 2 of the 26 Dutch regions case workers...</p></a>