author = { Bloom, Nicholas National Bureau of Economic Research Saporta-Eksten, Itay AND Floetotto, Max AND Jaimovich, Nir AND Terry, Stephen J. },

title = { Really Uncertain Business Cycles },

publisher = {National Bureau of Economic Research},

year = {July 2012},

booktitle = {NBER working paper series ; no. w18245},

address = { Cambridge, Mass },

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