This is the most successful age when Silicon Valley founders exit

HBO

Super-young Silicon Valley founders aren't necessarily the most successful.

• Many associate startup founders with young 20-somethings.
• A presentation from researchers at The National Bureau of Economic Research found the average exit age of successful silicon valley startup founders was 47.

When you think of successful Silicon Valley entrepreneurs who sell their startup or take it public, you'd be forgiven if you thought they were typically in their 30s, or even their 20s.

The average exit age of successful Silicon Valley startup founders between 2007 and 2014 was actually 47. That's according to to a post from July on Digitopoly by entrepreneurship professor Joshua Gans citing a paper from the NBER Summer Institute.

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Gans also quoted investor Paul Graham in a 2013 interview with The New York Times, who said, "The cutoff in investors' heads is 32 … after 32 they tend to be a little skeptical."

With that mindset, investors could be missing out on golden opportunities. Indeed, the bright star of youth is certainly alluring, but nothing beats experience.

Gans says the finding is from basic data results and the research is still developing, but it's still worth the consideration of Silicon Valley investors who tend to gravitate toward younger entrepreneurs.