Geir Bjarne Asheim

Geir Bjarne Asheim

dates de séjour

16/01/2017 - 14/07/2017

discipline

Économie

fonction

Professeur

organisme

Department of Economics, University of Oslo

pays d'origine

Norvège

projet de recherche

Intergenerational risks, variable population & sustainability

In spite of the development that accumulated reproducible and human capital has led to during the recent past, there are clear conicts of interest between generations: the wellbeing of future generations might be undermined unless we take costly action today. Climate policies are a prime example of such costly current action with long-term future bene_ts: Should we incur costs today, by abating anthropogenic emissions of CO2 and other greenhouse gases, in order to reduce the risk of serious and irreversible changes in future living conditions? This normative question of intergenerational equity can be addressed by imposing ethically attractive properties (called axioms) on distributions of wellbeing among gen- erations to determine what criteria should be used for evaluating climate policies. (In Asheim, 2010, I present a review of the axiomatic literature of intergenerational equity; my own contributions can be found on http://folk.uio.no/gasheim/articles.htm, see articles 1{21 under \Intergenerational Justice".) Criteria of intergenerational equity generally lead to sustainable outcomes in models of economic growth. The concept of rank-discounted utilitarianism (rdu; Zuber and Asheim, 2012) is a criterion that treats generations equally (formally, it satis_es an axiom of Anonymity). Discounting is according to rank, and not time as in the usual time-discounted utili- tarian criterion. Hence, discounting expresses aversion to inequality. In later papers (Asheim and Zuber, 2013, 2014, 2015) we have developed this concept further by con- sidering, respectively, extreme rank-discounting, variable population and risk. In the setting of variable population and risk, Anonymity becomes a requirement to treat people equally across time, location, and uncertain states. The research project described here considers the consequences of di_erent versions of rdu for the resolution of long-term distributional conicts between generations.

biographie

Geir Bjarne Asheim est licencié en mathématiques et en économie de l’université de Bergen, Norvège, et docteur en économie de l’université de Californie, à Santa Barbara. Professeur d’économie à l’université d’Oslo depuis 1994, il a occupé des postes de professeur invité dans de nombreuses universités américaines incluant Cornell, Harvard, Northwestern et Stanford. Ses principaux domaines de recherche sont : (1) la théorie des jeux, sur laquelle il a publié The Consistent Preferences - Approach to Deductive Reasoning in Games (2006), ainsi que de nombreux articles spécialisés (l’un d’entre eux ayant obtenu le Royal Economic Society Prize) ; (2) l'équité intergénérationnelle, au sujet de laquelle il publie depuis plus de vingt-cinq ans. Geir Asheim se consacre actuellement à l’axiomatisation de l'équité intergénérationnelle, recherche notamment motivée par la nécessité de résoudre le conflit intergénérationnel induit par le changement climatique.

institut

01/05/2007