In the early 1990s, the Canadian Philosophical Association claimed that "...there is compelling evidence" of "...philosophy’s gender imbalance" and "bias and partiality in many of its theoretical products." In 1992, the association recommended that "fifty percent of should be filled by women.” In a 2008 article “Changing the Ideology and Culture of Philosophy: Not by Reason (Alone),” MIT philosophy professor Sally Haslanger stated that the top twenty graduate programs in philosophy in the US have from 4 percent to 36 percent women faculty. In June 2013, Duke University professor of sociology Kieran Healy stated that "out of all recent citations in four prestigious philosophy journals, female authors comprise just 3.6 percent of the total." The editors of the Stanford Encyclopedia of Philosophy have raised concerns about the underrepresentation of women philosophers; as such, the encyclopedia “encourage[s authors, subject editors, and referees to help ensure that SEP entries do not overlook the work of women or indeed of members of underrepresented groups more generally.”