APA
Heckman J. J., Li Xuesong & National Bureau Of Economic Research. (2003). Selection bias, comparative advantage and heterogeneous returns to education: Evidence from China in 2000. Cambridge, MA: NBER.
Chicago
Heckman James J, Li Xuesong and National Bureau Of Economic Research. 2003. Selection bias, comparative advantage and heterogeneous returns to education: Evidence from China in 2000. Cambridge, MA: NBER.
Harvard
Heckman J. J., Li Xuesong and National Bureau Of Economic Research. (2003). Selection bias, comparative advantage and heterogeneous returns to education: Evidence from China in 2000. Cambridge, MA: NBER.
MLA
Heckman James J, Li Xuesong and National Bureau Of Economic Research. Selection bias, comparative advantage and heterogeneous returns to education: Evidence from China in 2000. Cambridge, MA: NBER. 2003.
TextSeries: NBER working papersPublication details: Cambridge, MA NBER 2003Description: 29pISBN: 
Working Papers (Print)
