@misc
{TN_libero_mab2,
author = {
Shang, Baoping
National Bureau of Economic Research
Goldman, Dana P.
},
title = {
Prescription Drug Coverage and Elderly Medicare Spending
},
publisher = {National Bureau of Economic Research},
year = {September 2007},
booktitle = {NBER working paper series ; no. w13358},
address = {
Cambridge, Mass
},
}