Search Results
Working Paper
The Social Returns to Public R&D
Recent empirical evidence by Fieldhouse and Mertens (2024) points to a strong causal link between federal nondefense R&D funding and private-sector productivity growth, and large implied social returns to public R&D investment. We show that these high social return estimates broadly align with existing evidence on the social returns to private or total R&D spending. If the R&D increases authorized under the CHIPS and Science Act were fully appropriated, our modeling indicates a boost in U.S. productivity within a few years, reaching gains of 0.2–0.4% after seven years or more. At their ...
Oil and Gas Sector Increasingly Influences U.S. Business Fixed Investment
As U.S. oil production has more than doubled over the past decade, the oil and gas sector has become more important to growth in non-residential investment.
Working Paper
The Returns to Government R&D: Evidence from U.S. Appropriations Shocks
We estimate the causal impact of government-funded R&D on business-sector productivity growth. Identification is based on a novel narrative classification of all significant postwar changes in appropriations for R&D funded by five major federal agencies. Using long-horizon local projections and the narrative measures, we find that an increase in appropriations for nondefense R&D leads to increases in various measures of innovative activity, and higher productivity in the long run. We structurally estimate the production function elasticity of nondefense government R&D capital using the SP-IV ...
Working Paper
The Postpandemic U.S. Immigration Surge: New Facts and Inflationary Implications
The U.S. experienced an extraordinary postpandemic surge in unauthorized immigration. This paper combines administrative data on border encounters and immigration court records with household survey data to document two new facts about these immigrants: They tend to be hand-to-mouth consumers and low-skilled workers that complement the existing workforce. We build these features into a model with capital, household heterogeneity and population growth to study the inflationary effects of this episode. Contrary to the popular view, we find little effect on inflation, as the increase in supply ...
Discussion Paper
Monitoring Real Activity in Real Time: The Weekly Economic Index
Economists are well-practiced at assessing real activity based on familiar aggregate time series, like the unemployment rate, industrial production, or GDP growth. However, these series represent monthly or quarterly averages of economic conditions, and are only available at a considerable lag, after the month or quarter ends. When the economy hits sudden headwinds, like the COVID-19 pandemic, conditions can evolve rapidly. How can we monitor the high-frequency evolution of the economy in “real time”?
Real-Time Survey to Provide Timelier Labor Market Data in Era of COVID-19
An effective economic policy response to the rapidly evolving coronavirus (COVID-19) crisis requires timely and accurate information on its impact. To help reduce the information gap, we introduce the Real-Time Population Survey.
Working Paper
The Postpandemic U.S. Immigration Surge: New Facts and Inflationary Implications
The U.S. experienced an extraordinary surge in immigration from 2021 to 2024, which triggered widespread discussions about its macroeconomic impact, particularly on inflation. To determine the impact of the immigration surge, we first document the salient features of these new immigrants: they are primarily low-skilled relative to the existing workforce and more likely to be hand-to-mouth consumers. We then incorporate these features into a heterogeneous agent model with capital-skill complementarity. We find that the supply- and demand-side effects of the immigration surge roughly cancel ...
Working Paper
The Near Term Growth Impact of the Tax Cuts and Jobs Act
This note uses existing empirical estimates of the macroeconomic effects of tax changes to project the near term impact of the Tax Cuts and Jobs Act on US GDP growth. Applying recent reduced form estimates of tax multipliers with the projected revenue impact of the Act yields a level of GDP that is predicted to be 1.3% higher by 2020, with most of the growth front-loaded in 2018. Accounting for the composition of the Act in terms of its individual and corporate provisions leads to a similar GDP increase by 2020, but with stronger growth in 2018 and a partial reversal in the following years. ...
Working Paper
Mobility and Engagement Following the SARS-Cov-2 Outbreak
We develop a Mobility and Engagement Index (MEI) based on a range of mobility metrics from Safegraph geolocation data, and validate the index with mobility data from Google and Unacast. We construct MEIs at the county, MSA, state and nationwide level, and link these measures to indicators of economic activity. According to our measures, the bulk of sheltering-in-place and social disengagement occurred during the week of March 15 and simultaneously across the U.S. At the national peak of the decline in mobility in early April, localities that engaged in a 10% larger decrease in mobility than ...
Working Paper
A Robust Test for Weak Instruments with Multiple Endogenous Regressors
We extend the popular bias-based test of Stock and Yogo (2005) for instrument strength in linear instrumental variables regressions with multiple endogenous regressors to be robust to heteroskedasticity and autocorrelation. Equivalently, we extend the robust test of Montiel Olea and Pflueger (2013) for one endogenous regressor to the general case with multiple endogenous regressors. We describe a simple procedure for applied researchers to conduct our generalized first-stage test of instrument strength and provide efficient and easy-to-use Matlab code for its implementation. We demonstrate ...