In his introduction he said that IARPA studies things like "Employment Events".
Sadly studies like that don't automatically appear on their website. It seems like you have to file a Freedom of Information Act (FOIA) request to get it. I've not been so motivated. Perhaps some one here might be.
"High-Risk High-Payoff Research IARPA invests in research programs to tackle some of the Intelligence Community's (IC) most difficult challenges."