[pg]

As in startup investing generally, the expected value comes mainly from a small chance of a big hit, multiplied by lots of investments. You're hoping that if you invest in 100 startups, one will be a Dropbox or Airbnb.

For this to work, you have to (a) invest in a lot of startups and (b) they have to be drawn from a pool that could include big winners.

The latter could actually be a problem, if you're not founders' first choice. If you lose the big winners, your returns might be orders of magnitude smaller, even if you get everyone else.

Yes, you do have to invest for years before you end up in the black, even if things go well. That's also true for startup investing generally.

When we started YC, the returns seemed completely unpredictable. (They still do actually.) What allowed us to do it was that we didn't care if we made money.

[jrodgers]

My thought on why that works for YC is that you are an educator. This thought is influenced not by your credentials but by students that I have known go into YC and what they seem to get out of it from an observers point of view. I don't think it should be about making money... it should be about education first, it would be nice if it at least covered everyone's costs (plus a little bit).

A post on higher ed and incubators is what lead me down the incubator math question... I just need to finish up the original post.

[pedalpete]

Though the big hit makes the major returns, doesn't the one small hit per session cover the operating expenses? (Reddit, Zenter, 280North, etc. etc.)

I think this is what the original post might be missing. The top incubator(s) can patiently wait for the big hits, as long as they've got 1-in-20(ish) small hits to keep them in the black.

[pg]

You can't count on that, because acquisitions are so unpredictable. In bad times they dry up entirely. YC was not in the black till December 2010, more than 5 years after we started.

[abiekatz]

Sounds like it was Heroku's $212 million sale to Salesforce that pushed YC into the black. Though, I imagine if you also include on paper gains, you were in the black much earlier.

[pg]

Actually it was either Zecter or Cloudkick. December was a big month.