Yeung-nan Shieh San Jose State University   Department of Economics One Washington Square San Jose State University San Jose, CA 95192-0114 USA   ynshieh@yahoo.com   www.sjsu.edu/people/yeung-nan.shieh/           JEL Areas: L1 : Market Structure, Firm Strategy, and Market Performance: General H2 : Taxation, Subsidies, and Revenue: General