Denver Nicks flags a study indicating so:
In democratic countries with generally low levels of corruption, the study says, they are less likely to be corrupt and less likely to tolerate corruption than male politicos. The effect does not hold up in countries where corruption is endemic, however. … [Study author Justin Esarey] reportedly theorized that women may feel more bound by the political norms of the society in which they are operating. Simply recruiting more women into politics in deeply corrupt countries would thus not decrease corruption; but in less corrupt countries, recruiting more women into public service may indeed decrease overall corruption.
Kat Stoeffel welcomes the report:
It takes the overwhelming evidence that countries with more women involved in government are less prone to corruption out of a gender-essentialist context. It’s not that women are naturally purer and more honest than men. It’s that women, who are newer, as a class, to governing, make more risk-averse politicians. … “Women have stronger incentives to adapt to political norms because of the risks created by gender discrimination,” they write. In other words, it was hard enough for women to get into politics in the first place. They don’t expect to survive a campaign-financing scandal or an unpopular filibuster or a bad investment.