author = { Carneiro, Pedro National Bureau of Economic Research Vytlacil, Edward J. AND Heckman, James J. },

title = { Estimating Marginal Returns to Education },

publisher = {National Bureau of Economic Research},

year = {October 2010},

booktitle = {NBER working paper series ; no. w16474},

address = { Cambridge, Mass },

url = { http://slubdd.de/katalog?TN_libero_mab2 }