Affiliation: | a Center for Operations Research and Econometrics, Chair Lhoist Berghmans in Environmental Economics and Management, Louvain School of Management, Université catholique de Louvain, Voie du Roman Pays 34, B-1348 Louvain-la-Neuve, Belgium b EconomiX, Université de Nanterre, France c Center for Operations Research and Econometrics, Université catholique de Louvain, Belgium |