We have done some research on this question. One part of the explanation is the origin of those women. They tend to come, increasingly, from countries where women are less likely to participate in the labour force. In order to fully understand the recent dynamics in the labour force, we're going to have to follow these women through administrative data. These are survey-based data, with relatively small sample sizes. There is an indication that something has been happening in the past five years, and we're going to have to follow that dynamic through administrative data, over the coming years.
On February 28th, 2019. See this statement in context.