Turbulence, firm decentralization and growth in bad times / Philippe Aghion (College de France, LSE and CEP), Nicholas Bloom (Stanford University, CEP, NBER, CEPR and IZA), Brian Lucking (Stanford University), Raffaella Sadun (Harvard University, CEP, CEPR and NBER), John van Reenen (MIT, CEP, NBER, CEPR and IZA) ; IZA, Institute of Labor Economics. Bonn, Germany : IZA Institute of Labor Economics, April 2017