Published once a year under the auspices of the Research Center of Mathematical Economics in Tokyo, this series brings together mathematicians interested in economic theories and economists seeking effective mathematical tools to aid their research. Articles set forth original results and detailed overviews of the problems under discussion, offering readers a clear understanding of both economic and mathematical theories.

Résumé
A lot of economic problems can formulated as constrained optimizations and equilibration of their solutions. Various mathematical theories have been supplying economists with indispensable machineries for these problems arising in economic theory. Conversely, mathematicians have been stimulated by various mathematical difficulties raised by economic theories. The series is designed to bring together those mathematicians who were seriously interested in getting new challenging stimuli from economic theories with those economists who are seeking for effective mathematical tools for their researchers. Members of the editorial board of this series consists of following prominent economists and mathematicians: Managing Editors: S. Kusuoka (Univ. Tokyo), A. Yamazaki (Hitotsubashi Univ.) - Editors: R. Anderson (U.C.Berkeley), C. Castaing (Univ. Montpellier II), F. H. Clarke (Univ. Lyon I), E. Dierker (Univ. Vienna), D. Duffie (Stanford Univ.), L.C. Evans (U.C. Berkeley), T. Fujimoto (Fukuoka Univ.), J. -M. Grandmont (CREST-CNRS), N. Hirano (Yokohama National Univ.), L. Hurwicz (Univ. of Minnesota), T. Ichiishi (Hitotsubashi Univ.), A. Ioffe (Israel Institute of Technology), S. Iwamoto (Kyushu Univ.), K. Kamiya (Univ. Tokyo), K. Kawamata (Keio Univ.), N. Kikuchi (Keio Univ.), T. Maruyama (Keio Univ.), H. Matano (Univ. Tokyo), K. Nishimura (Kyoto Univ.), M. K. Richter (Univ. Minnesota), Y. Takahashi (Kyoto Univ.), M. Valadier (Univ. Montpellier II), M. Yano (Keio Univ).

Contenu
Optimal hedging strategies on asymmetric functions.- Tightness conditions and integrability of the sequential weak upper limit of a sequence of multifunctions.- Core convergence in economies with bads.- A distance and a binary relation related to income comparisons.- On preference relations that admit smooth utility functions.- Rational expectations can preclude trades.- The Le Chatelier Principle in dynamic models of the firm.- Interdependent utility functions in an intergenerational context.