APA
Lefgren L. J., National Bureau of Economic Research, Pope J. C. & Sims D. P. (2019). Contemporary state policies and intergenerational income mobility. Cambridge: NBER.
Chicago
Lefgren Lars J, National Bureau of Economic Research, Pope Jaren C and Sims David P. 2019. Contemporary state policies and intergenerational income mobility. Cambridge: NBER.
Harvard
Lefgren L. J., National Bureau of Economic Research, Pope J. C. and Sims D. P. (2019). Contemporary state policies and intergenerational income mobility. Cambridge: NBER.
MLA
Lefgren Lars J, National Bureau of Economic Research, Pope Jaren C and Sims David P. Contemporary state policies and intergenerational income mobility. Cambridge: NBER. 2019.