@incollection{cunha2006handbook,
  author    = {Cunha, Flavio and Heckman, James J. and Lochner, Lance and Masterov, Dimitriy V.},
  title     = {Interpreting the Evidence on Life Cycle Skill Formation},
  booktitle = {Handbook of the Economics of Education},
  chapter   = {12},
  pages     = {697--812},
  publisher = {North Holland},
  year      = {2006},
  category  = {pub},
  topics    = {early, edu}
}