This is Volume 24 of the monograph series International Symposia in Economic Theory and Econometrics. ISETE publishes proceedings of conferences and symposia, as well as research monographs of the highest quality and importance. All articles published in these volumes are refereed relative to the standards of the best journals, therefore not all papers presented at related symposia are published in these proceedings volumes. The topics chosen for these volumes are those of particular research importance at the time of the selection of the topic.