@misc{CaliendoHujer2005,
  author    = {Marco Caliendo and Reinhard Hujer},
  title     = {The microeconometric estimation of treatment effects : an overview},
  booktitle = {IZA Discussion Paper ; 1653},
  institution = {Wirtschaftswissenschaften},
  type      = {workingpaper},
  year        = {2005},
}