Are shocks to firms' profitability risk, propagated by physical capital adjustment costs, a major source of business cycle fluctuations? This paper studies this question using a heterogeneous-firm dynamic stochastic general equilibrium model, where firms face fixed capital adjustment costs....

Is impacting confidence an important channel by which government spending shocks affect economic activity? In a standard structural VAR, an empirical measure of confidence does not significantly react to spending shocks and output multipliers are around one. In a non-linear VAR, confidence rises...