Curriculum vita
Curriculum vita
Basil Halperin
basilh@virginia.edu
basilhalperin.com
Education
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Ph.D., Massachusetts Institute of Technology
2018–2024
- Economics
- Thesis: Essays in Monetary Policy and Growth
- Committee: George-Marios Angeletos, Iván Werning, Christian Wolf
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B.S., University of Chicago
2011–2015
- Mathematics, Economics, Chinese
Employment and affiliations
- University of Virginia
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Assistant Professor, Department of Economics
2025 –
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Associate Director, Economics of Transformative AI Initiative
2025 –
- Stanford Digital Economy Lab
- Stripe Economics of AI Fellowship
Past employment
- Stanford Digital Economy Lab
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Postdoctoral Fellow
2024–2025
- Uber
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Data Scientist, Ubernomics
2017–2018
- AQR Capital Management
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Quantitative Research Analyst
2015–2016
Publications
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1. Toward an understanding of the economics of apologies: evidence from a large-scale natural field experiment (with Ben Ho, John A. List, and Ian Muir), The Economic Journal, 132(641): 273–298, 2022.
▸ Abstract
We use a theory of apologies to analyze a nationwide field experiment involving 1.5 million Uber ridesharing consumers who experienced late rides. Several insights emerge. First, apologies are not a panacea: the efficacy of an apology and whether it may backfire depend on how the apology is made. Second, across treatments, money speaks louder than words - the best form of apology is to include a coupon for a future trip. Third, in some cases sending an apology is worse than sending nothing at all, particularly for repeated apologies. For firms, caveat venditor should be the rule when considering apologies.
Working papers
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1. Optimal monetary policy under menu costs (with Daniele Caratelli)
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2. Transformative AI, existential risk, and real interest rates (with Trevor Chow and J. Zachary Mazlish)
We study how financial market prices can be used to forecast the likelihood of transformative artificial intelligence. Transformative AI is a double-edged sword: while advanced AI could lead to rapid economic growth, some researchers argue that superintelligence misaligned with human values could pose an existential risk to humanity. Theoretically, we show that either possibility would predict a large increase in long-term real interest rates, due to consumption smoothing. We then use rich cross-country data on real rates and growth expectations to show that, contrary to other recent findings, higher long-term growth expectations do indeed cause higher long-term real interest rates.
3. Reexamining optimal policy in the New Keynesian “liquidity trap”
I make five conceptual points about optimal monetary and fiscal policy at the zero lower bound (ZLB) in representative agent New Keynesian models, using the simplest possible version of such a model.
- Monetary policy is typically described as facing a time consistency problem at the zero lower bound; but if ZLB episodes are a repeated game rather than a one-shot game – as is empirically realistic – then the time consistency problem can be easily overcome by reputational effects.
- The ZLB is not special, in terms of the constraint it creates for monetary policy: an intratemporal rigidity, such as the minimum wage or rent control, creates exactly the same kind of constraint on monetary policy as the intertemporal rigidity of the ZLB.
- Austerity is stimulus: in the representative agent New Keynesian model, fiscal stimulus works through the change in government spending. Promising to cut future spending – committing to austerity – has precisely the same effect on inflation and the output gap as a decision to raise spending today.
- Fiscal stimulus can be contractionary, when targeted heterogeneously: if fiscal spending is targeted at certain sectors, this can in fact lower inflation and deepen the output gap.
- Fiscal policy faces a time consistency problem at the ZLB, just as monetary policy does.
Overall, I suggest that – in this class of models – the power of monetary policy at the ZLB has been underrated, and the power of fiscal policy has been overrated.
4. Overreaction and forecast horizon (with J. Zachary Mazlish)
We use survey data on macroeconomic expectations, across 89 countries and going back to 1989, to establish four facts about how forecast biases depend on the time horizon of the forecast. The data cover average expectations and horizons from 0 to 10 years. (1) Expectations underreact at a horizon of one year or less. (2) Expectations overreact at horizons of two years or more. (3) Expectations are “too extreme” at all horizons. (4) Overreaction and over-extremity increase with forecast horizon. These four patterns hold across advanced and emerging economies, and across multiple macroeconomic variables. They are inconsistent with several popular models of overreaction, where the degree of overreaction is independent of forecast horizon. However, we show that a model featuring costly recall, uncertainty about the long-run mean, and sticky-information can match all four of our facts. Finally, although long-term expectations exhibit stronger overreaction, it is short-term expectations that are most strongly associated with fluctuations in GDP, investment, and the stock market.
5. When Does Automating AI Research Produce Explosive Growth? (with Tom Davidson, Thomas Houlden, and Anton Korinek)
AI labs are increasingly using AI itself to accelerate AI research, creating a feedback loop that could potentially lead to an “intelligence explosion”. We develop a general semi-endogenous growth model with an innovation network, where research and automation in one sector increases the productivity of research in other sectors, and derive a clean analytical condition under which growth becomes superexponential (“explosive”). The key intuition is that automation of research both offsets diminishing returns to research and increases cross-sectoral research spillovers, making explosive growth more likely. Applying this model to a calibrated, AI-integrated economy, we demonstrate that the growth effects of automation may be slow initially but compound rapidly. In our benchmark calibration, the level of automation needed to double the long-run growth rate already achieves well over half of the automation level needed to generate explosive growth.
Fellowships and honors
- AI Worldviews Contest, first prize (Open Philanthropy) 2023
- Global Priorities Fellowship (Global Priorities Institute) 2022
- Emergent Ventures Fellow (Mercatus Center) 2021
- Doctoral Grant (Washington Center for Equitable Growth) 2021
- Humane Studies Fellow (Institute for Humane Studies) 2021
- Oskar Morgenstern Fellow (Mercatus Center) 2021
- Avanessians Fellowship (MIT) 2018–2024
- Phi Beta Kappa (UChicago) 2015
- Becker-Friedman Institute Award for Outstanding Undergraduate Service (UChicago) 2015
Presentations (conferences & seminars, including scheduled)
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2025: San Francisco Fed; Touro Law; Hong Kong Institute for Monetary and Financial Research; Hong Kong University Business School; UC Berkeley; NBER Summer Institute; Richmond Fed; MIT FutureTech; International Monetary Fund
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2024: University of Virginia; Einaudi Institute for Economics and Finance; Office of Financial Research (US Treasury); Global Priorities Institute (Oxford); Carnegie Mellon University – Tepper; Midwest Macro Spring (Richmond Fed); Euro Area Business Cycle Network Conference (Mannheim); Southern Economic Association
- Pre-2024: Global Priorities Institute (Oxford); Equitable Growth conference 2022; Economics Graduate Student Conference 2021 (WashU); Advances with Field Experiments 2019 (UChicago); AEAs 2018; Université Paris-Sud; Advances with Field Experiments 2017 (UChicago)
Service
Referee: Journal of Political Economy, Journal of Political Economy Microeconomics, Journal of Monetary Economics, National Science Foundation, The Yale Law Journal, Macroeconomic Dynamics, American Economic Journal: Macroeconomics, Journal of Human Capital
Teaching
- University of Virginia
- Undergraduate intermediate macro 3020 (fall 2025)
- Graduate second year macro (spring 2026)
- Massachusetts Institute of Technology (Teaching Assistant)
- Undergraduate intro macro 14.02 (fall 2020, fall 2021, fall 2022)
- Undergraduate intermediate micro 14.03 (spring 2021, spring 2024)
- Undergraduate micro theory 14.04 (fall 2022)
- Graduate monetary economics 14.453 (spring 2021)
Other
- Last updated: January 2026