That's exactly the kind of question that will be considered in the big study linking the type of work, the environment—whether urban or rural—and gender. All of these aspects have to be taken into consideration. Unfortunately at this point we do not have a multi-dimensional study looking at all of these aspects together. We have bits and pieces here and there and we suspect there are relationships such as the one you suggest. We need this, and it's coming soon.
On May 28th, 2013. See this statement in context.