[vannevar]

One question I had was whether the overall rate of entrepreneurship increased. As you note, the papers seem to focus on rates within the population that receives the benefits, but the typical conservative argument is that the cost of those benefits in taxes retards economic growth overall. I'm not suggesting that they are right (as far as I know no substantial link has yet been found between low tax rates and economic growth), but it's a question worth addressing in the article and it was not.