author = { Thomasson, Melissa A. National Bureau of Economic Research },

title = { The Importance of Group Coverage How Tax Policy Shaped U.S. Health Insurance },

publisher = {National Bureau of Economic Research},

year = {February 2000},

booktitle = {NBER working paper series ; no. w7543},

address = { Cambridge, Mass },

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