The earnings gap between men and women, an apt indicator of women's status relative to men's, was roughly constant for the thirty-five years between 1950 and 1985. During this period women earned about 60 to 65 cents for every dollar earned by men. The purpose of this study is to analyze the determinants of this wage gap. Because much existing research suggests that a large portion of the gender gap in pay results from the segregation of women into low-paying jobs, the present study focuses on the role of gender segregation in the workplace. Other potential contributors to the earnings gap are also examined (women's domestic obligations, educational attainment, women's labor force participation rates, and the industrial mix in Standard Metropolitan Statistical Areas). The position of women as a group in the labor market is of primary interest in this research. Accordingly, the analysis was conducted on an aggregate level across labor markets. The data were drawn from the Bureau of the Census Census of the Population: 1980—Detailed Population Characteristics. The project uses a cross-sectional research design, the primary statistical technique used being multiple regression analysis. Findings reveal that workplace segregation and the industrial characteristics of SMSA labor markets have the strongest effect on the size of the gender-based earnings gap. Specifically, workplace segregation is positively related to the size of the earnings gap between men and women. The presence of above average levels of manufacturing activity in an SMSA is associated with a larger earnings gap while the presence of above average levels of service sector and government employment opportunities in an SMSA is associated with smaller earnings differentials between men and women. This study enhances the understanding of the effects of structural variables on the earnings determination process for men and women and provides insight into the collective situation of women in the labor market.