It's actually only one study, and both the lead author and the conducting body have their doubts about it:
>Professor Hiscox said he discussed the trial with the ABS and did not consider it a rigorous or randomised control trial, warning against any "magic pill" solution.
The discussion section of the study's report also opines that the voluntary nature of recruiter selection [1] as well as the absence of a control group could skew results, and that particular recruitment processes were not studied for engendered bias before designing the trial.
[1] - ie, recruiters who tended to be more supportive of diversification in the public sector would be more likely to participate
>Professor Hiscox said he discussed the trial with the ABS and did not consider it a rigorous or randomised control trial, warning against any "magic pill" solution.
The discussion section of the study's report also opines that the voluntary nature of recruiter selection [1] as well as the absence of a control group could skew results, and that particular recruitment processes were not studied for engendered bias before designing the trial.
[1] - ie, recruiters who tended to be more supportive of diversification in the public sector would be more likely to participate