Technology shocks and the business cycle

Business cycles

Some comments on the role of econometrics in economic theory

The basic tension facing econometricians is that structural models are necessary for addressing monetary policy questions. But all models are, by their very nature, false. Econometric programs that focus on testing whether models are true will be ignored by practicing macroeconomists. The critical task facing econometricians is to develop diagnostic tools for assessing the usefulness of models for addressing particular questions. This article reviews two diagnostic strategies.Econometrics ; Economics

Fiscal Policy in the Aftermath of 9/11

This paper investigates the nature of U.S. fiscal policy in the aftermath of 9/11. We argue that the recent dramatic fall in the government surplus and the large fall in tax rates cannot be accounted for by either the state of the U.S. economy as of 9/11 or as the typical response of fiscal policy to a large exogenous rise in military expenditures. Our evidence suggests that, had tax rates responded in the way they `normally' do to large exogenous changes in government spending, aggregate output would have been lower and the surplus would not have changed by much. The unusually large fall in tax rates had an expansionary impact on output and was the primary force underlying the large decline in the surplus. Our results do not bear directly on the question of whether the decline in tax rates and the decline in the surplus after 9/11 were desirable or not.

Government Finance in the Wake of Currency Crises

Currency crisis, banking crisis, speculative attacks, seigniorage, fiscal reform, bailouts

Factor Hoarding and the Propagation of Business Cycles Shocks

This paper analyzes the role of variable capital utilization rates in propagating shocks over the business cycle. To this end we formulate and estimate an equilibrium business cycle model in which cyclical capital utilization rates are viewed as a form of factor hoarding. We find that variable capital utilization rates substantially magnify and propagate the impact of shocks to agents' environments. The strength of these propagation effects is evident in the dynamic response functions of various economy wide aggregates to shocks in agents' environments, in the statistics that we construct to summarize the strength of the propagation mechanisms in the model and in the volatility of exogenous technology shocks needed to explain the observed variability in aggregate U.S. output. Other authors have argued that standard Real Business Cycle (RBC) models fail to account for certain features of the data because they do not embody quantitatively important propagation mechanisms. These features include the observed positive serial correlation in the growth rate of output, the shape of the spectrum of the growth rate of real output and the correlation between the forecastable component of real output and various other economic aggregates. Allowing for variable capital utilization rates substantially improves the ability of the model to account for these features of the data.

Fiscal policy in the aftermath of 9/11

This paper investigates the nature of U.S. fiscal policy in the aftermath of 9/11. We argue that the recent dramatic fall in the government surplus and the large fall in tax rates cannot be accounted for by either the state of the U.S. economy as of 9/11 or as the typical response of fiscal policy to a large exogenous rise in military expenditures. Our evidence suggests that, had tax rates responded in the way they ‘normally’ do to large exogenous changes in government spending, aggregate output would have been lower and the surplus would not have changed by much. The unusually large fall in tax rates had an expansionary impact on output and was the primary force underlying the large decline in the surplus. Our results do not bear directly on the question of whether the decline in tax rates and the decline in the surplus after 9/11 were desirable or not.Fiscal policy ; Terrorism

Evaluating the Calvo Model of Sticky Prices

Can variants of the classic Calvo (1983) model of sticky prices account for the statistical behavior of post-war US inflation? We develop and test versions of the model for which the answer to this question is yes. We then investigate whether these models imply plausible degrees of inertia in price setting behavior by firms. We find that they do, but only if we depart from two auxiliary assumptions made in standard expositions of the Calvo model. These assumptions are that monopolistically competitive firms face a constant elasticity of demand and capital can be instantaneously reallocated after a shock. When we modify these assumptions our model is consistent with the view that firms re-optimize prices

Identification and the Liquidity Effect of a Monetary Policy Shock

Conventional wisdom holds that unanticipated expansionary monetary policy shocks cause transient but persistent decreases in real and nominal interest rates. However a number of econometric studies argue that the evidence favors the opposite view, namely that these shocks actually raise, rather than lower, short term interest rates. We show that this conclusion is not robust to the measure of monetary aggregate used or to the assumptions made to identify monetary policy disturbances. For example, when our analysis is done using non borrowed reserves, we find strong evidence in favor of the conventional view. Existing challenges to the conventional view lack credibility not just because of their fragility. They are based upon measures of policy disturbances which generate seemingly implausible implications about things other than interest rates.

How does an increase in government purchases affect economy?

This article studies the impact on aggregate economic activity of increases in defense purchases which are unrelated to other developments in the economy. The authors use empirical evidence to evaluate the predictions of several prominent models.Economic development ; Macroeconomics ; Labor market ; Expenditures, Public ; Defense industries