This paper develops a dynamic general equilibrium model that is intended to help clarify the role of credit market frictions in business fluctuations, from both a qualitative and a quantitative standpoint. The model is a synthesis of the leading approaches in the literature. In particular, the framework exhibits a financial accelerator,' in that endogenous developments in credit markets work to amplify and propagate shocks to the macroeconomy. In addition, we add several features to the model that are designed to enhance the empirical relevance. First, we incorporate money and price stickiness, which allows us to study how credit market frictions may influence the transmission of monetary policy. In addition, we allow for lags in investment which enables the model to generate both hump-shaped output dynamics and a lead-lag relation between asset prices and investment, as is consistent with the data. Finally, we allow for heterogeneity among firms to capture the fact that borrowers have differential access to capital markets. Under reasonable parametrizations of the model, the financial accelerator has a significant influence on business cycle dynamics.

https://papers.ssrn.com/sol3/Delivery.cfm/nber_W6455.pdf?abstractid=226200&mirid=1

The Financial Accelerator in a Quantitative Business Cycle Framework

We present a model embodying moderate amounts of nominal rigidities that accounts for the observed inertia in inflation and persistence in output. The key features of our model are those that prevent a sharp rise in marginal costs after an expansionary shock to monetary policy. Of these features, the most important are staggered wage contracts that have an average duration of three quarters and variable capital utilization.

/pdf/nominal-rigidities-and-the-dynamic-effects-of-a-shock-to-24aok45g1c.pdf

Nominal Rigidities and the Dynamic Effects of a Shock to Monetary Policy

We estimate a forward-looking monetary policy reaction function for the postwar United States economy, before and after Volcker’s appointment as Fed Chairman in 1979. Our results point to substantial differences in the estimated rule across periods. In particular, interest rate policy in the Volcker-Greenspan period appears to have been much more sensitive to changes in expected ineation than in the pre-Volcker period. We then compare some of the implications of the estimated rules for the equilibrium properties of ineation and output, using a simple macroeconomic model, and show that the Volcker-Greenspan rule is stabilizing.

/pdf/monetary-policy-rules-and-macroeconomic-stability-evidence-ta3rndvypp.pdf

Monetary policy rules and macroeconomic stability: Evidence and some theory

Using a Bayesian likelihood approach, we estimate a dynamic stochastic general equilibrium model for the US economy using seven macro-economic time series. The model incorporates many types of real and nominal frictions and seven types of structural shocks. We show that this model is able to compete with Bayesian Vector Autoregression models in out-of-sample prediction. We investigate the relative empirical importance of the various frictions. Finally, using the estimated model we address a number of key issues in business cycle analysis: What are the sources of business cycle fluctuations? Can the model explain the cross-correlation between output and inflation? What are the effects of productivity on hours worked? What are the sources of the "Great Moderation"?

/pdf/shocks-and-frictions-in-us-business-cycles-a-bayesian-dsge-d1f6ynd58q.pdf

Shocks and Frictions in US Business Cycles: A Bayesian DSGE Approach

We estimate a dynamic stochastic general equilibrium (DSGE) model for the US economy. The model incorporates many types of real and nominal frictions: sticky nominal price and wage setting, habit formation in consumption, investment adjustment costs, variable capital utilisation and fixed costs in production. It also contains many types of shocks including productivity, labour supply, investment, preference, cost-push and monetary policy shocks. Using Bayesian estimation techniques, the relative importance of the various frictions and shocks in explaining the US business cycle are empirically investigated. We also show that this model is able to outperform standard VAR and BVAR models in out-of-sample prediction.

/pdf/shocks-and-frictions-in-us-business-cycles-a-bayesian-dsge-2gcs6kvruw.pdf

Shocks and frictions in US business cycles: A Bayesian DSGE approach

We ask whether a two-country real business cycle model can account simultaneously for domestic and international aspects of business cycles. With this question in mind, we document a number of discrepancies between theory and data. The most striking discrepancy concerns the correlations of consumption and output across countries. In the data, outputs are generally more highly correlated across countries than consumptions. In the model we see the opposite.

/pdf/international-real-business-cycles-4imxbeqt0a.pdf

International Real Business Cycles

The authors provide a theoretical interpretation of two features of international data: the countercyclical movements in net exports and the tendency for the trade balance to be negatively correlated with current and future movements in terms of trade but positively correlated with past movements. They document the same properties in a two-country stochastic growth model in which trade fluctuations reflect, in large part, the dynamics of capital formation. The authors find that their general-equilibrium perspective is essential: the relation between the trade balance and the terms of trade depends critically on the source of fluctuations. Copyright 1994 by American Economic Association.

/pdf/dynamics-of-the-trade-balance-and-the-terms-of-trade-the-j-4keqlv2uhj.pdf

Dynamics of the trade balance and the terms of trade: The J-curve?

We contrast properties of real quantities with those of price levels and stocks of money for ten countries over the last century. Although the magnitude of output fluctuations has varied across countries and periods, relations among real quantities have been remarkably uniform. Properties of price levels, however, exhibit striking differences between periods. Inflation rates are more persistent after World War II than before, and price-level fluctuations are typically procyclical before World War II and countercyclical afterward. Fluctuations in money are less highly correlated with output in the postwar period but are no more persistent than in earlier periods. (JEL E32, E31)

https://www.jstor.org/stable/pdfplus/2117348.pdf

International Evidence on the Historical Properties of Business Cycles

The central puzzle in international business cycles is that real exchange rates are volatile and persistent. The most popular story for real exchange rate fluctuations is that they are generated by monetary shocks interacting with sticky goods prices. We quantify this story and find that it can account for some of the observed properties of real exchange rates. When prices are held fixed for at least one year, risk aversion is high and preferences are separable in leisure, the model generates real exchange rates that are as volatile as in the data. The model also generates real exchange rates that are persistent, but less so than in the data. If monetary shocks are correlated across countries, then the comovements in aggregates across countries are broadly consistent with those in the data. Making asset markets incomplete or introducing sticky wages does not measurably change the results.

/pdf/can-sticky-price-models-generate-volatile-and-persistent-7wfrbpenzp.pdf

Can Sticky Price Models Generate Volatile and Persistent Real Exchange Rates

We propose a simple method to help researchers develop quantitative models of economic fluctuations. The method rests on the insight that many models are equivalent to a prototype growth model with time-varying wedges which resemble productivity, labor and investment taxes, and government consumption. Wedges corresponding to these variables–efficiency, labor, investment, and government consumption wedges–are measured and then fed back into the model in order to assess the fraction of variousfluctuations they account for. Applying this method to U.S. data for the Great Depression and the 1982 recession reveals that the efficiency and labor wedges together account for essentially all of the fluctuations; the investment wedge plays a decidedly tertiary role, and the government consumption wedge, none. Analyses of the entire postwar period and alternative model specifications support these results. Models with frictions manifested primarily as investment wedges are thus not promising for the study of business cycles.

/pdf/business-cycle-accounting-4tyz7np3vi.pdf

Patrick J. Kehoe

Papers

International Real Business Cycles

Dynamics of the trade balance and the terms of trade: The J-curve?

International Evidence on the Historical Properties of Business Cycles

Can Sticky Price Models Generate Volatile and Persistent Real Exchange Rates

Business cycle accounting