NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH
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Santiago Tobón

University of Chicago
Pearson Institute and Harris Public Policy
& Innovations for Poverty Action
Peace and Recovery Program
Calle 98 No. 22-64 Of 307
Bogotá, Colombia

E-Mail: EmailAddress: hidden: you can email any NBER-related person as first underscore last at nber dot org
Institutional Affiliation: University of Chicago & IPA

NBER Working Papers and Publications

October 2017Place-Based Interventions at Scale: The Direct and Spillover Effects of Policing and City Services on Crime
with Christopher Blattman, Donald Green, Daniel Ortega: w23941
Cities target police patrols and public services to control crime. What are the direct and spillover effects of such targeted state services? In 2016 the city of Bogotá, Colombia, experimented on an unprecedented scale. They randomly assigned 1,919 streets to either 8 months of doubled police patrols, greater municipal services, both, or neither. We study how crime responds to intensifying normal state presence in moderate- to high-crime streets, and what this implies about criminal behavior. Scale also brings challenges. Spatial spillovers in dense networks introduce bias and complicate variance estimation through “fuzzy clustering.” But a design-based approach and randomization inference produce valid hypothesis tests in such settings. We find that increasing state presence has modest di...
 
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