Abstract. Can markets discipline socially costly misbehavior abroad? We explore the market penalty associated with major human rights violations—specifical

Abstract. This article investigates whether virtual contact, initiated through a documentary film, can promote interethnic harmony. We carried out a cluste

(Forthcoming Article) - We examine how social interactions and friendships shape students' political opinions in a natural experiment at Sciences Po, a leading French university specializing in social and political sciences. The quasi-random assignment of students into short-term integration groups before their academic curriculum reduces political opinion gaps and fosters friendship formation. Using same-group membership as an instrumental variable for friendship, we find that friendship reduces opinion differences by 40% of a standard deviation in the opinion gap. Our evidence supports a homophily-enforced mechanism: friendships form among initially politically similar students, leading them to join political associations together, reinforcing their similarity.

Vol. 116 No. 4 April 2026

(April 2026) - We develop a simple multilayer network model in which agents allocate effort across layers with heterogeneous structures, subject to an aggregate effort constraint. Incentives are shape...

(Forthcoming Article) - We develop a simple multilayer network model in which agents allocate effort across layers with heterogeneous structures, subject to an aggregate effort constraint. Incentives are shaped by agents’ network positions within each layer, and equilibrium behavior reflects both within- and cross-layer interactions. We analyze how shocks propagate through the network and characterize optimal targeting interventions. Our results show that effective policy design must account for effort allocation across layers. We also demonstrate that predictions from monolayer models can diverge sharply from those of multilayer models, underscoring the importance of accounting for network complexity in both empirical and policy analyses.

This paper reviews the theoretical and empirical foundations of peer and network effects, aiming to bridge insights from both literatures. We first examine the

ROCKWOOL Foundation

How can crime be disrupted most effectively without increasing resources? To answer this question, we develop a spatial network model to analyze crime diffusion

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(December 2024) - We provide the first nationally representative long-run series (1870–2020) of incarceration rates for immigrants and the US-born. As a group, immigrants have had lower incarceration ...

How peer behavior shapes academic and career outcomes

On December 10, 2024, Daron Acemoglu delivered an acceptance speech at the Nobel Banquet in Stockholm, on behalf of himself, Simon Johnson, and James A.…

How do disruptive peers shape academic and career paths? We examine this question by leveraging the random assignment of students to classrooms in Greece and id