One methodological issue as I reread that paper: "We allowed company executives to tell us if they were a founder. The guidelines we provided for defining a fou

One methodological issue as I reread that paper: "We allowed company executives to tell us if they were a founder. The guidelines we provided for defining a founder was 'an early employee, who typically joined the company in its first year, before the company developed its products and perfected its business model.'" Companies often give out the co-founder title to early employees, but that's not what we think of when we read that 'most founders are 40' here at HN.