This essay presents the first analysis of gender differences in productivity using panel data on scientists in low-income countries. About 540 researchers in Ghana, Kenya, and Kerala were studied using the same survey instrument in 2001 and 2005. Results indicate very few gender disparities in outcomes at either period of the study with one exception: productivity in international journals. The authors show that substantial gains in access to technology and higher education by women have not reduced the gender gap on (...) this important career dimension. (shrink)