JOSEPH G. ALTONJI Professor, Department of Economics and Faculty Fellow, Institute for Policy Research, Northwestern University LORNE CARMICHAEL Professor of Economics and Head of the Department, Queen's University, Kingston, Ontario, Canada HIROYUKI CHUMA Professor of Economics, Faculty of Economics, Hitotsubashi University JOOP HARTOG Professor of Microeconomics, University of Amsterdam OSAMU HAYASHIDA Lecturer, Osaka Keizai University, Japan HEDESHI ITOH Associate Professor of Economics, Institute of Social and Economic Research, Osaka University, Japan EDWARD LAZEAR Jack Steele Professor of Human Resources Management and Economics, Stanford University KONOSUKE ODAKA Professor of Economics and Economic History, Institute of Economic Research, Hitotsubashi University SOUICHI OHTA Assistant Professor of Economics, Nagoya University, Japan CHARLES R.PIERRET Research Economist, Office of Economic Research and Program Development, Bureau of Labour Statistics, US Department of Labour TERUKAZU SURUGA Professor of Economics, Osaka Prefecture University, Japan HIROSHI TERUYAMA Associate Professor of Economics, Kyoto University, Japan COEN TEULINGS Professor of Labour Economics and Economic Policy, University of Amsterdam SHIGERU WAKITA Associate Professor of Economics, Tokyo Metropolitan University KLAUS F.ZEMMERMANN Professor of Economics, University of Munich and Director of SELAPO