All of the conclusions are a waste of time... Of course they show those results, when you make a mistake this big.
You may as well have gone with price of people's cars and concluded that it's best to buy a Porsche if you want to be successful.
But, this stuck out as something worthy of more study:
>The average incorporated self-employed person is highly able – they did well on aptitude tests like the SAT, they have high self-esteem, and were successful in salaried employment, earning more than other workers with similar characteristics.
There could be a subset of the self-employed that is basically "soon to be incorporated", which is the group I believe myself to be in. In my case, my salaried peer group are graduates of one of the top Canadian law schools. My default non-business option would have been a high salary; I only did business because I thought I could get something comparable, but with more freedom.
You might be able to use the common traits among the incorporated to do further analysis within the self-employed group.
My comment may be invalid then. Canada has no such structure, so incorporation is a big threshold. You can still do it easily, but it adds a lot of accounting and admin work.