The contents of this web page are based on my master's thesis submitted to the Sociology Department of Queens College, CUNY, in the Fall 1998 semester. This thesis would never have reached completion without the contribution of many people. I wish to express my sincere thanks to my advisers, Dr. Pyong Gap Min and Dr. Dean Savage at the Department of Sociology for reading the draft and making a number of helpful suggestions. I also thank other faculties and my friends at Queens College for their helpful advice and encouragement.