RePEc added 18 new archives in May 2006, bringing the total to 608. Archive no. 500 became active on 2005-10-11; archive no. 600 on 2006-05-18, just over seven months. The new additions: HAH Chair of Resource Economics of the Faculty of Agriculture and Horticulture, Humboldt University of Berlin FOR Foresight: The International Journal of Applied Forecasting SBR Schmalenbach Business Review MIK Chair of Microeconomic Theory, Universität Dortmund UWA UWA Business School, University of Western Australia MIS Department of Statistics, Università degli Studi di Milano-Bicocca UMR INRA - UMR MOISA VNM Dipartimento di Matematica Applicata, Università "Ca' Foscari" di Venezia CEN Bureau of the Census TUT Center for Research in Economics and Management (CREM), CNRS BSU Department of Economics, Ball State University FLN International Institute of Management, University of Flensburg AUU Department of Economics, Australian National University BAG Department of Agricultural Economics and Agricultural Engineering, University of Bologna IFR Institute for Federalism and Intergovernmental Relations, University of Kentucky KEE University of Keele, UK, DLS Centro de Estudios Distributivos, Laborales y Sociales (CEDLAS), Universidad Nacional de La Plata GIG Leibniz-Institut für Globale und Regionale Studien, Hamburg Research Papers in Economics (RePEc) http://repec.org