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Working Paper
Multilateral Comovement in a New Keynesian World: A Little Trade Goes a Long Way
We study how international linkages and nominal price rigidities jointly shape the dynamics of inflation and output across multiple large economies. We describe how these features produce a global system of Phillips curves explicitly connected by multilateral trade relationships. In equilibrium, disturbances abroad propagate to domestic variables not only directly, through pairwise trade between countries, but also indirectly through third-country effects arising from the network structure of trade. The combined propagation mechanisms imply that country-specific shocks alone explain almost 90 ...
Working Paper
Global Robust Bayesian Analysis in Large Models
This paper develops a tool for global prior sensitivity analysis in large Bayesian models. Without imposing parametric restrictions, the methodology provides bounds for posterior means or quantiles given any prior close to the original in relative entropy, and reveals features of the prior that are important for the posterior statistics of interest. The author develops a sequential Monte Carlo algorithm and uses approximations to the likelihood and statistic of interest to implement the calculations. Applying the methodology to the error bands for the impulse response of output to a monetary ...
Briefing
How Do Demographics Influence r*?
Demographic trends are evolving in the U.S. as well as globally, potentially affecting the behavior of interest rates. This includes the natural rate of interest, denoted r*. Through the lens of a simple model, we describe supply and demand channels through which these demographic trends may affect r* and show a range of estimates for the potential quantitative impact.
Discussion Paper
Forecasting the COVID-19 Pandemic in the Fifth District
How many COVID-19 cases will there be in the coming days and months? While the Fifth District appears to be past the peak number of daily cases, a wide range of future outcomes is still possible.
Briefing
Macroeconomic Effects of Household Pessimism and Optimism
Survey data on households' expectations about macroeconomic outcomes reveal systematic differences from statistical (or rational) forecasts. We construct an empirical measure of these differences, which we refer to as "belief wedges." Across economic variables, such as inflation and unemployment, these belief wedges are significant and move in parallel with the business cycle. We present a theory of time-varying belief wedges that accounts for these empirical facts. Our theory provides a formal interpretation of these wedges as pessimism and optimism. Embedding the theory into a quantitative ...
Working Paper
How To Go Viral: A COVID-19 Model with Endogenously Time-Varying Parameters
This paper estimates a panel model with endogenously time-varying parameters for COVID-19 cases and deaths in U.S. states. The functional form for infections incorporates important features of epidemiological models but is flexibly parameterized to capture different trajectories of the pandemic. Daily deaths are modeled as a spike-and-slab regression on lagged cases. The paper's Bayesian estimation reveals that social distancing and testing have significant effects on the parameters. For example, a 10 percentage point increase in the positive test rate is associated with a 2 percentage point ...
Briefing
How Does Trade Impact the Way GDP Growth and Inflation Comove Across Countries?
Seemingly small international trade linkages can lead to substantial spillovers across countries, going a long way in explaining the well-documented global comovement in GDP growth and inflation across countries. The spillovers come largely from indirect effects, with shocks in a foreign country not only propagating to the domestic economy directly but also cumulating through the trade network via other foreign countries. We develop and estimate a model incorporating these network effects, and we find that inflationary shocks in Europe have substantial effects on U.S. inflation and that U.S. ...
Working Paper
Survey Data and Subjective Beliefs in Business Cycle Models
This paper develops a theory of subjective beliefs that departs from rational expectations, and shows that biases in household beliefs have quantitatively large effects on macroeconomic aggregates. The departures are formalized using model-consistent notions of pessimism and optimism and are disciplined by data on household forecasts. The role of subjective beliefs is quantified in a business cycle model with goods and labor market frictions. Consistent with the survey evidence, an increase in pessimism generates upward biases in unemployment and inflation forecasts and lowers economic ...
Working Paper
Averaging Impulse Responses Using Prediction Pools
Macroeconomists construct impulse responses using many competing time series models and different statistical paradigms (Bayesian or frequentist). We adapt optimal linear prediction pools to efficiently combine impulse response estimators for the effects of the same economic shock from this vast class of possible models. We thus alleviate the need to choose one specific model, obtaining weights that are typically positive for more than one model. Three Monte Carlo simulations and two monetary shock empirical applications illustrate how the weights leverage the strengths of each model by (i) ...
Working Paper
Bubbles and the Value of Innovation
Episodes of booming innovation coincide with intense speculation in financial markets leading to bubbles—increases in market valuations and firm creation followed by a crash. We provide a framework reproducing these facts that makes a rich set of predictions on how speculation changes both the private and social values of innovation. We confirm the theory in the universe of U.S. patents issued from 1926 through 2010. Measures based on financial market information indicate that speculation increases the private value of innovation and reduces negative spillovers to competing firms. No ...