Google publishes a lot of their work at https://rework.withgoogle.com/ https://rework.withgoogle.com/. Also, Google's former head of people (Lazlo Block) found

Google publishes a lot of their work at https://rework.withgoogle.com/ https://rework.withgoogle.com/. Also, Google's former head of people (Lazlo Block) founded a company that is focusing on that area: https://humu.com/ https://humu.com/. While I wasn't always a fan of Google People/HR procedures while I was there, I did always appreciate the data-driven/research approach Lazlo and the People team took.