APA
Mulligan C. B., Salai I Martin Xavier & National Bureau Of Economic Research. (1999). Social security in theory and practice (I): Facts and political theories. Cambridge, MA: NBER.
Chicago
Mulligan Casey B, Salai I Martin Xavier and National Bureau Of Economic Research. 1999. Social security in theory and practice (I): Facts and political theories. Cambridge, MA: NBER.
Harvard
Mulligan C. B., Salai I Martin Xavier and National Bureau Of Economic Research. (1999). Social security in theory and practice (I): Facts and political theories. Cambridge, MA: NBER.
MLA
Mulligan Casey B, Salai I Martin Xavier and National Bureau Of Economic Research. Social security in theory and practice (I): Facts and political theories. Cambridge, MA: NBER. 1999.
TextSeries: Working paper seriesPublication details: Cambridge, MA NBER 1999Description: 38pISBN: 
Working Papers (Print)
