Martin, Alberto; Ventura, Jaume - National Bureau of Economic Research <Cambridge, Mass.> - 2010
dispersion in the rates of return to investment. During bubbly episodes, unproductiveinvestors demand bubbles while productive … investors supply them. Because of this, bubbly episodeschannel resources towards productive investment raising the growth rates … of capital and output. Themodel also illustrates that the existence of bubbly episodes requires some investment to be …