Gender-based occupational segregation – where women are concentrated in low-paid or low-profit sectors – is a non-trivial source of the gender wage gap worldwide, accounting for as much as 50 percent of the gap in some countries (World Bank 2011). There is evidence that women's biases about their own potential can affect their performance and aspirations. Through an experiment in Nigeria, we found that an information and communications technology (ICT) training resulted in university graduates being 26 percent more likely to work in the ICT sector.