Is there a gender wage gap in online labor markets?

>Once we include workers’ wage bill proposals in the regressions, the gender wage gap virtually disappears, i.e., it is statistically insignificant and very small in magnitude (0.3%)

>We also find that female workers propose lower wage bills and are more likely to win the competition for contracts.

For the curious as to what type of projects these might be, the average cost for each was about 100 euros.