We use firm dynamics statistics on employment by age, entry, exit, and job flows to identify sources of business cycle fluctuations in the U.S. economy since 1980. We extend the Hopenhayn (1992) firm dynamics model by incorporating capital and debt accumulation to the firm's problem and savings to the consumer's problem. Analyzing the implications of unexpected productivity, credit, labor wedge, and investment wedge shocks for firm dynamics statistics, we show that (a) productivity shock accounts for the 1990-91 and 2001 recessions, and (b) productivity and credit shocks jointly account for the 1980-82 and 2007-09 recessions.

Labor Markets and Business Cycles integrates search and matching theory with the neoclassical growth model to better understand labor market outcomes. Robert Shimer shows analytically and quantitatively that rigid wages are important for explaining the volatile behavior of the unemployment rate in business cycles. The book focuses on the labor wedge that arises when the marginal rate of substitution between consumption and leisure does not equal the marginal product of labor. According to competitive models of the labor market, the labor wedge should be constant and equal to the labor income tax rate. But in U.S. data, the wedge is strongly countercyclical, making it seem as if recessions are periods when workers are dissuaded from working and firms are dissuaded from hiring because of an increase in the labor income tax rate. When job searches are time consuming and wages are flexible, search frictions--the cost of a job search--act like labor adjustment costs, further exacerbating inconsistencies between the competitive model and data. The book shows that wage rigidities can reconcile the search model with the data, providing a quantitatively more accurate depiction of labor markets, consumption, and investment dynamics. Developing detailed search and matching models, Labor Markets and Business Cycles will be the main reference for those interested in the intersection of labor market dynamics and business cycle research.

This paper examines how the state of the economy when businesses begin operations affects their size and performance over the lifecycle. Using micro-level data that covers the entire universe of businesses operating in the U.S. since the late 1970s, I provide new evidence that businesses born in downturns start on a smaller scale and remain smaller over their entire lifecycle. In fact, I find no evidence that these differences attenuate even long after entry. Using new data on the productivity and composition of startup businesses, I show that this persistence is related to selection at entry and demand-side channels. In order to evaluate the relative importance of these two mechanisms, I build a model of firm dynamics that includes aggregate shocks, idiosyncratic productivity, and a demand accumulation process. When I mute the effects of selection mechanisms, I find that the average initial size differences are more procyclical, but they are less persistent over time. Finally, I use the model to quantitatively evaluate the role of the persistent effects of entry conditions in the propagation of the Great Recession. My model simulations indicate that the impact of the crisis on the 2008-2009 cohorts reduces aggregate employment by at least one percentage point in the following ten years.

Traditionally, economic growth and business cycles have been treated independently. However, the dependence of GDP levels on its history of shocks, what economists refer to as “hysteresis,” argues for unifying the analysis of growth and cycles. In this paper, we review the recent empirical and theoretical literature that motivate this paradigm shift. The renewed interest in hysteresis has been sparked by the persistence of the Global Financial Crisis and fears of a slow recovery from the Covid-19 crisis. The findings of the recent literature have far-reaching conceptual and policy implications. In recessions, monetary and fiscal policies need to be more active to avoid the permanent scars of a downturn. And in good times, running a high-pressure economy could have permanent positive effects.

This paper explores how macroeconomic conditions affect firm dynamics in Egypt between 1911 and 1948 by constructing an extensive dataset of all companies ever founded in this period. By exploiting Egyptian economy's specialization in cotton exports, I use fluctuations in the world price of cotton to identify the direct impact of the business cycle on firm entry, exit, and growth. The analysis shows that growth occurred primarily at the extensive margin. Firm entry was procyclical but exit and growth were both acyclical. The new evidence reveals cyclical selection into entry. Booms systematically selected low quality entrants, which were smaller, less likely to grow after entry, and frailer than other cohorts. Bust cohorts were larger, more likely to grow, and more robust. The quality differences were persistent over the firms' lifecycles. These new findings support a theory of firm dynamics with ex-ante heterogeneous firms, permanent productivity differences between cohorts, and economic adjustment through the extensive margin of entry.

This is the most sophisticated and up-to-date econometric analysis of business cycles now available. Francis Diebold and Glenn Rudebusch have long been acknowledged as leading experts on business cycles. And here they present a highly integrative collection of their most important essays on the subject, along with a detailed introduction that draws together the book's principal themes and findings. Diebold and Rudebusch use the latest quantitative methods to address five principal questions about the measurement, modeling, and forecasting of business cycles. They ask whether business cycles have become more moderate in the postwar period, concluding that recessions have, in fact, been shorter and shallower. They consider whether economic expansions and contractions tend to die of "old age." Contrary to popular wisdom, they find little evidence that expansions become more fragile the longer they last, although they do find that contractions are increasingly likely to end as they age. The authors discuss the defining characteristics of business cycles, focusing on how economic variables move together and on the timing of the slow alternation between expansions and contractions. They explore the difficulties of distinguishing between long-term trends in the economy and cyclical fluctuations. And they examine how business cycles can be forecast, looking in particular at how to predict turning points in cycles, rather than merely the level of future economic activity. They show here that the index of leading economic indicators is a poor predictor of future economic activity, and consider what we can learn from other indicators, such as financial variables. Throughout, the authors make use of a variety of advanced econometric techniques, including nonparametric analysis, fractional integration, and regime-switching models. Business Cycles is crucial reading for policymakers, bankers, and business executives.