Can't think of a policy for our situation since we don't have a real inflow here to manage. This is more like a rural village with all the young people moved out, the old ones dead or out to pasture, and the middle-aged ones left to bicker in the dank pub.
It is possible for our culture to reduce female participation, but I'm not sure how to assess it retroactively in the Org context. Most of the women here, and most of the newer arrivals overall, I have interacted with over games of Mafia.
In many cases, a preponderance has less to do with differences in interests than with differences in external messaging and stereotypes combined with exclusionary internal practices.
In living memory the fields of social work, nursing, and clinical therapy have been dominated by women. We have no reason to believe that women are intrinsically more interested or suited for these professions; it's mostly gerrymandering. We can change it over time, open up the fields for men - as has been happening to various extents.* In technical fields, especially Computer Science, men are the ones who dominate, and retrenchment in the late 20th century has regressed the ratio today. To repeat, both external (upbringing, messaging, and conditioning) and internal (professional and academic culture) factors can and should be addressed to even out the proportions.
It is not that having equal proportions in all things is ideal in itself, but that very frequently unequal proportions have more to do with harmful ideas and practices than with "choices and preferences".
*Note that even in these fields men have remained over-represented in the upper ranks, administration, and management.
A lack of female CEOs is not a problem from the standpoint that we should not be encouraging more people to be CEOs (or financiers, for example) - but the generic issue of power imbalance and representation in leadership remains. Leadership selection in business and the workplace, at least as much as in politics and the military, relies on networking over merit. We don't have much reason to reflect on "interests, abilities, and personal ambitions" while chauvinism prevails.
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