I don't have hard data, but only a feeling that it should be easier to bootstrap in France than in US. Assuming you have worked previously, you can get unemployment benefits, around 60% of your previous salary for a year, and are covered by universal healthcare. So even if you need to have open heart surgery, you won't bankrupt your family for the next 7 generations. Actually someone (very brilliant) in my team is le…
Some of us started working on the project while getting unemployment benefits (huge boost).
We get (very) affordable office spaces from the city and various incubators (we are located in Paris).
We are able to live on first customers + 0% loans from the state + hundreds of thousands of euros in various grants for innovation (http://www.bpifrance.fr/), so we don't need to dilute our shares by raising funds too early.
We get no income taxes for the first years.
Employees have social security. Healthcare is cheap and very good.
Why would we want to start run company anywhere else?