Mutual funds approaching the IRS 50/5/10 portfolio concentration limit trim large positions, reduce equity exposure, and subsequently underperform.

This article introduces the evidence and associated modeling frameworks contemporary economists use to understand the effects of trade and trade policy on labor markets, with a particular emphasis on ...

GLP-1 medications generate large weight loss and may also alter social and economic outcomes. Using the Understanding America Study, I compare women starting GLP-1s for weight loss with matched women ...

Large language models (LLMs) are lowering the entry barriers to working with exciting data sources that used to require strong data science skills, such as handwritten ledgers, text, images, or sound ...

What information do policymakers need to design Pigouvian taxes or subsidies? Standard logic suggests that it is sufficient to know the size of the externality and unnecessary to know about quantities ...

This paper studies how geopolitical risk shapes financial fragmentation and international risk-sharing, using bilateral official lending data from 1910 to 2024. We document that when geopolitical risk ...

In addition to working papers, the NBER disseminates affiliates’ latest findings through a range of free periodicals — the NBER Reporter, the NBER Digest, the Bulletin on Health, and the Bulletin on ...

Artificial intelligence (AI) reshapes workers’ comparative advantage by altering the tasks they perform and the skills those tasks require. We develop a dynamic task-based model to quantify the ...

We ask how far the choice of which moments to match can push estimates in misspecified structural models. The answer is: very far. Under regularity conditions, an adversarial researcher informed about ...

We study how wealth inequality shapes safe-asset demand in heterogeneous-agent economies. Asset bubbles arise when agents face sufficiently high probabilities of falling into extreme poverty. In such ...

We run a randomized controlled trial among 203 Kenyan minibuses, testing whether an incentive scheme improves safety overall or merely shifts unsafe driving to unmonitored times. Drivers reduce ...

Boudreaux, Brandy Lipton, and Melissa McInerney, "When Medicaid Pays the Bill: Routine Vision Benefits, Eye Care Use, and Eyeglasses Spending Among Dual-eligible Medicar ...