An earnings gap between males and females persists largely due to continued differences in education access and type, participation in the highest paying occupations, and mobility between jobs. Using a model that relates differences in workers’ mobility to differences in earnings, this paper estimates wage elasticity to job transitions using labor force panel surveys for Brazil. First, it tests for gender differences in elasticity and analyzes whether these differences explain part of the observed gender-earnings gap; second, it tests for heterogeneous elasticity across formal and informal sectors and according to occupation and education levels. Results show that male workers supply labor more elastically than female workers (1.513 vs. 1.214), a statistically significant difference controlling for education level and occupation group. This difference implies an earnings gap of 9.8 percent compared to a 25.3 percent difference in actual mean earnings. I emphasize the need to use confidence bands to highlight sectors with significant differences. For instance, gender elasticity differences are statistically significant for manual workers and those with less than a primary education who have been self-employed, suggesting that the relative lack of mobility of female workers in these sectors relates to lower earnings compared to male workers.