Generally at Statistics Canada the information we have is observing what's going on. The why is harder to get at. Often it's either because of the.... Sometimes it's stabilities. We often see in an economic cycle that if there's an economic downturn, people will go into self-employment. When the economy goes up, they'll leave self-employment and go to paid work where there are more benefits and more stability.
But I don't know of any studies that's concentrated in that way.