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Insecurity and Firm Displacement: Evidence from Afghan Corporate Phone Records

By Sylvan Herskowitz, Joshua E. Blumenstock, Tarek Ghani, Ethan B. Kapstein, Thomas L. Scherer, and Ott Toomet

American Economic Journal: Economic Policy

We provide empirical evidence on how insecurity affects firm behavior by linking data on deadly terrorist attacks in Afghanistan to geolocated data on corporate mobile phone activity. We first develop an approach to estimate the geographic footprint of ...

Sustainability in a Risky World

By John Y. Campbell and Ian W. R. Martin

American Economic Review: Insights, June 2025

How much consumption is sustainable, if "sustainability" requires that welfare should not be expected to decline over time? We impose a sustainability constraint on a standard consumption/portfolio choice problem. The constraint does not distort portfolio...

The Geographic Flow of Bank Funding and Access to Credit: Branch Networks, Synergies, and Local Competition

By Victor Aguirregabiria, Robert Clark, and Hui Wang

American Economic Review, June 2025

Geographic dispersion of depositors, borrowers, and banks may prevent funding from flowing to high-loan-demand areas, limiting credit access. Using bank-county-year-level data, we provide evidence of geographic imbalance of deposits and loans and develop ...