I will share a personal, direct experience that might shed some light on that. First of all, as Dr. MacDonald mentioned, it takes time for peer-reviewed, data-based research, which is usually funded from grants, etc., to get up, running, be executed, and published. So there is always a time lag, and sometimes that time lag can run to a total of three or four years. As soon as the 1996 unpaid work data became available, I rushed to my nearest Status of Women Canada office to look for funding. But along the way, I managed to get funding even more quickly from the Law Commission of Canada to carry out a research project in the tax policy area that was very near and dear to my heart, on the destructive impact of joint taxation on women particularly.
That paper was published fairly quickly because it was published by the law commission itself and was available and circulating for a total of five or six years. It's no longer available, however, unless someone makes a personal appointment to come to my office and take a copy out of the boxes in my office, because when the Law Commission of Canada was defunded in 2006, its offices were closed. It was told to dispose of all its assets for the best price, and the dump truck would be along on a specific date. The web page was torn down and is only available through an obscure, mirrored version based at Dalhousie University. And the research is, for all practical purposes, invisible. So I don't have any problem believing that when the Statistics Canada gender experts went looking for evidence of use of these data, they may have had a hard time finding a great deal of it.
Status of Women Canada did fund a huge amount of research on this. That research has all been taken off the web page, hidden in government archives, not available on the Internet, and is not available for sale.