GEIR B. ASHEIM University of Oslo, NorwayCLAUDE D' ASPREMONT Center for Operations Research and Econometrics, Université de Louvain, BelgiumKAUSIK BASU Cornell University, USACHARLES BLACKORBY University of Warwick, UKWALTER BOSSERT Université de Montréal, CanadaDAVID DONALDSON University of British Columbia, CanadaMARC FLEURBAEY Université de Pau et des Pays de l'Adour, FranceTOSHIHIRO IHORI University of Tokyo, JapanTAPAN MITRA Cornell University, USATOMOICHI SHINOTSUKA University of Tsukuba, JapanKOICHI SUGA Waseda University, JapanJOAQUIM SILVESTRE University of California at Davis, USAKOICHI TADENUMA Institute of Economic Research, Hitotsubashi University, JapanNORIYUKI TAKAYAMA Institute of Economic Research, Hitotsubashi University, JapanBERTIL TUNGODDEN Norwegian School of Economics and Business Administration, NorwayPETER VALLENTYNE University of Missouri at Columbia, USANGO VAN LONG McGill University, CanadaROBERTO VENEZIANI Queen Mary College, University of London, UKYONGSHENG XU Andrew Young School of Policy Studies, University of Atlanta, USANAOKI YOSHIHARA Institute of Economic Research, Hitotsubashi University, Japan

• Introduction; J.Roemer & K.Suzumura PART 1: EQUITY AMONG OVERLAPPING GENERATIONS Pension Contributions and Capital Accumulation; T.Ihori Equity and Efficiency in Overlapping Generations Economies; T.Shinotsuka, K.Suga, K.Suzumura & K.Tadenuma Social Security Pensions and Interregional Equity: The Japanese Case; N.Takayama PART 2: RANKING INFINITE UTILITY STREAMS A New Equity Condition for Infinite Utility Streams and the Possibility of Being Paretian; G.B.Asheim, T.Mitra & B.Tungodden Possibility Theorems for Equitably Aggregating Infinite Utility Systems; K.Basu & T.Mitra On the Existence of Paretian Social Welfare Quasi-orderings for Infinite Utility Streams with Extended Anonymity; T.Mitra & K.Basu Pareto Principle and Intergenerational Equity: Immediate Impatience, Universal Indifference and Impossibility; Y.Xu PART 3: INTERGENERATIONAL EVALUATIONS Formal Welfarism and Intergenerational Equity; C.d'Aspremont Intertemporal Social Evaluation; C.Blackorby, W.Bossert & D.Donaldson Intergenerational Fairness; M.Fleurbaey Person-Affecting Paretian Egaliterianism with Variable Population Size; B.Tungodden & P.Vallentyne PART 4: SUSTAINABILITY AND HUMAN DEVELOPMENT Intergenerational Justice and Sustainability under the Leximin Ethic; J.Roemer Intergenerational Justice, International Relations, and Sustainability; J.Roemer & R.Veneziani Intergenerational Equity and Human Development; J.Silvestre PART 5: LONG-RUN ISSUES OF INTERGENERATIONAL EQUITY Toward a Just Savings Principle; N.Van Long Normative Approaches to the Issues of Global Warming: Responsibility and Compensation; K.Suzumura & K.Tadenuma Fundamental Incompatibility Between Economic Efficiency, Intergenerational Equity and Sustainability; N.Yoshihara Index