Calendrier du 05 février 2018
Roy Seminar (ADRES)
Du 05/02/2018 de 17:00 à 18:30
Salle R1-09, Campus Jourdan, 48 boulevard Jourdan, 75014 Paris
SPRUMONT Yves (Université de Montréal)
Strategy-proof Choice of Acts
écrit avec Eric Bahel
We model uncertain social prospects as acts mapping states of nature to (public) outcomes. A social choice function (or SCF) assigns an act to every profile of subjective expected utility preferences over acts. A SCF is strategyproof if no agent ever has an incentive to misrepresent her beliefs about the states of nature or her valuation of the outcomes; it is ex-post efficient if the act selected at any given preference profile picks a Pareto-efficient outcome in every state of nature. We offer a complete characterization of all strategyproof and ex-post efficient SCFs. The chosen act must pick the most preferred outcome of some (possibly different) agent in every state of nature. The set of states in which an agent's top outcome is selected may vary with the reported belief profile; it is the union of all the states assigned to her by a collection of constant, bilaterally dictatorial, or bilaterally consensual assignment rules.
Régulation et Environnement
Du 05/02/2018 de 12:00 à 14:00
Salle R1-13, Campus Jourdan, 48 boulevard Jourdan, 75014 Paris
BEZIN Emeline ()
The Economics of Green Consumption, Cultural Transmission and Sustainable Technological Change.
A model shows that systematic interactions between green consumer culture and sustainable technologies can give rise to path dependency in sustainable innovation processes. The theory includes (i) green preferences formed through cultural transmission which involves rational socialization actions, (ii) innovation endogenously directed to sustainable or unsustainable sectors depending on culture through market size effects. When interactions between green culture and technology are strong enough, the dynamics exhibits complementarities resulting in path dependency. Two long-term outcomes emerge. A green equilibrium (with strong green culture and an environmentally benign technology), a brown equilibrium (with weak green culture and a pollution-intensive technology). The model has important implications for the cost of environmental policies. Moreover, the theory enables the study of an important disregarded issue, i.e., the political sustainability of environmental taxes.