First Author:   Hyunbae Chun Queens College, City University of New York hchun@qc1.qc.edu   Department of Economics, Queens College, City University of New York, 65-30 Kissena Blvd. Flushing, 11367, USA   718 997 5450(Phone) 718 997 5450(Fax) Second Author: Sung-Bae Mun Korea Information Strategy Development Institute sungbaemun@kisdi.re.kr   Information Industry Division, Korea Information Strategy Development Institute, 1-1 Juam-dong Kwachun,, 427-710, Korea   +82-2-570-4071(Phone) +82-2-570-4169(Fax)