Search Results
Working Paper
What inventories tell us about aggregate fluctuations -- a tractable approach to (S,s) policies
We estimate a DSGE model with (S,s) inventory policies. We find that (i) taking inventories into account can significantly improve the empirical fit of DSGE models in matching the standard business-cycle moments (in addition to explaining inventory fluctuations); (ii) (S,s) inventory policies can significantly amplify aggregate output fluctuations, in contrast to the findings of the recent general-equilibrium inventory literature; and (iii) aggregate demand shocks become more important than technol- ogy shocks in explaining the business cycle once inventories are incorporated into the model. ...
Working Paper
Incomplete information and self-fulfilling prophecies
This paper shows that incomplete information can be a rich source of sunspots equilibria. This is demonstrated in a standard dynamic general equilibrium model of monopolistic competition ? la Dixit-Stiglitz. In the absence of fundamental shocks, the model has a unique certainty (fundamental) equilibrium, but there are also multiple stochastic (sunspots) equilibria that are not mere randomizations over fundamental equilibria. In other words, sunspots can exist in infinite-horizon dynamic models with a unique saddle path steady state. In contrast to the recent sunspots literature (e.g., ...
Working Paper
Land-price dynamics and macroeconomic fluctuations
We argue that positive comovements between land prices and business investment are a driving force behind the broad impact of land-price dynamics on the macroeconomy. We develop an economic mechanism that captures the comovements by incorporating two key features into a DSGE model: we introduce land as a collateral asset in firms' credit constraints, and we identify a shock that drives most of the observed fluctuations in land prices. Our estimates imply that these two features combine to generate an empirically important mechanism that amplifies and propagates macroeconomic fluctuations ...
Working Paper
Financial development and long-run volatility trends
Countries with more developed financial markets tend to have significantly lower aggregate volatility. This relationship is also highly non-linear starting from a low level of financial development the reduction in aggregate volatility is far more significant with respect to financial deepening than when the financial market is more developed. We build a fully-edged heterogeneous-agent model with an endogenous financial market of private credit and debt to rationalize these stylized facts. We show how financial development that promotes better credit allocations under more relaxed borrowing ...
Working Paper
Imperfect competition and sunspots
This paper shows that imperfect competition can be a rich source of sunspots equilibria and coordination failures. This is demonstrated in a dynamic general equilibrium model that has no major distortions except imperfect competition. In the absence of fundamental shocks, the model has a unique certainty (fundamental) equilibrium. But there is also a continuum of stochastic (sunspots) equilibria that are not mere randomizations over fundamental equilibria. Markup is always counter-cyclical in sunspots equilibria, which is consistent with empirical evidence. The paper provides a justification ...
Working Paper
Financial development and economic volatility: a unified explanation
Empirical studies showed that firm-level volatility has been increasing but the aggregate volatility has been decreasing in the US for the post-war period. This paper proposes a unified explanation for these diverging trends. Our explanation is based on a story of financial development - measured by the reduction of borrowing constraints because of greater access to external financing and options for risk sharing. By constructing a dynamic stochastic general-equilibrium model of heterogenous firms facing borrowing constraints and investment irreversibility, it is shown that financial ...
Working Paper
Inflation Disagreement Weakens the Power of Monetary Policy
We present empirical evidence that household inflation disagreement weakens the power of forward guidance and conventional monetary policy shocks. The attenuation effect is stronger when inflation forecasts are positively skewed and it is not driven by endogenous responses of inflation disagreement to contemporaneous shocks. These empirical observations can be rationalized by a model featuring heterogeneous beliefs about the central banks' inflation target. An agent who perceives higher future inflation also perceives a lower real interest rate and thus borrows more to finance consumption, ...
Working Paper
Liquidity Premia, Price-Rent Dynamics, and Business Cycles
n the U.S. economy during the past 25 years, house prices exhibit fluctuations considerably larger than house rents, and these large fluctuations tend to move together with business cycles. We build a simple theoretical model to characterize these observations by showing the tight connection between price-rent fluctuation and the liquidity constraint faced by productive firms. After developing economic intuition for this result, we estimate a medium-scale dynamic general equilibrium model to assess the empirical importance of the role the price-rent fluctuation plays in the business cycle. ...
Working Paper
When do inventories destabilize the economy? an analytical approach to (S,s) policies
Conventional wisdom has it that inventory investment destabilizes the economy because it is procyclical to sales. Khan and Thomas (2007) show that the conventional wisdom is wrong in a general equilibrium (S,s) model with capital. We argue that their finding is not robust?the conventional wisdom can still hold in general equilibrium if firms can adjust output by varying the capacity utilization rate. Our result also holds true if there exist investment adjustment costs. Unlike the existing (S,s) inventory literature that relies on the Krusell-Smith (1998) numerical solution methods, we ...
Working Paper
Another look at sticky prices and output persistence
Price rigidity is the key mechanism for propagating business cycles in traditional Keynesian theory. Yet the New Keynesian literature has failed to show that sticky prices by themselves can effectively propagate business cycles in general equilibrium. We show that price rigidity in fact can (by itself) give rise to a strong propagation mechanism of the business cycle in standard New Keynesian models, provided that investment is also subject to a cash-in-advance constraint. In particular, we show that reasonable price stickiness can generate highly persistent, hump-shaped movements in output, ...