What is a good age to start your own business?

Wikipedia’s Jimmy Wales, TechCrunch’s Michael Arrington, Netflix’s Reed Hastings, Craigslist’s Craig Newmark, and Zipcar’s Robin Chase.

Those entrepreneurs were 35, 35, 37, 42, and 42, respectively, when they founded those companies.

I’ve seen a study that says a business with a founder aged 39 is the most likely to succeed. And according to the Kaufman…