Notes, Comments and Preliminary results Apr 30 2004 Shunsuke Managi and Shinji Kaneko   Environmental Productivity in China   Abstract  Contact Information  Citation  Full Text  -  Preliminary Result   Mar 02 2004 Shunsuke Managi   Unit root cycles in the US unemployment rate   Abstract  Contact Information  Citation  Full Text  -  Note   Feb 05 2004 Shunsuke Managi   Trade Liberalization and the Environment: Carbon Dioxide for 1960-1999   Abstract  Contact Information  Citation  Full Text  -  Note