For decades, economists concerned with the problems of economic development have noted the typical existence of surplus labor in heavily populated, underdeveloped countries, most notably those of Asia, in which the factor endowment consists of abundant and often rapidly growing labor forces coupled with scarcity of both land and capital. In such countries, the vast majority of the population usually is engaged in agricultural activities and, at a minimum, is characterized by substantial seasonal unemployment during the slack agricultural times of the year and, more typically, also has substantial disguised unemployment throughout the entire year. Also characteristic of such countries is a continuing large-scale migration of labor from rural to urban areas, which transforms the disguised agricultural unemployment into open urban unemployment as the newly (and not-so-newly) arrived urban residents discover that the jobs they seek are substantially fewer than the number of job-seekers. Furthermore, even those fortunate enough to find urban employment often appear to be substantially underemployed, for example, in jobs within the government sector, in petty retail trade, and as messengers and private household servants. Even in countries that have been experiencing relatively high levels of investment and fairly rapid rates of economic growth, the employment problems are far from eliminated and cause social and political problems as well as economic ones. It seems ironic that in such countries there exists simultaneously so many people seeking work and so much work that could be accomplished and could raise basic living standards if the unemployed (and underemployed) workers could be engaged in productive (and more productive) activities.