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Maximizing City Safety: Police Force Impact on Crime Rate

Explore the correlation between police force size and crime rates in cities to determine the effectiveness of hiring more officers. Analyze data from 61 cities to estimate the impact on crime with additional police employment.

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Maximizing City Safety: Police Force Impact on Crime Rate

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  1. A More “Economic” Example • Public finance economists are interested in the productivity of government spending • Two largest components of local spending are schools and public safety • Will hiring more police reduce crime?

  2. Let y=crime rate (crime per person) • Let x=police employed per person • Interested in estimating the gradient • dy/dxhow will crime change when a city hires more police

  3. Collect data on a cross section of cities • 61 cities with populations in excess of 250K • Estimate basic model Yi = β0 + β1Xi + εi • What do you think is the most frequent sign (+ or -) on police?

  4. Crime Rank 1. Detroit 2. Memphis 3. Baltimore 4. Nashville 5. Philadelphia 6. Washington, DC 7. Boston Rank of Police force size 10 27 6 25 8 1 9 Highest violent crime rates

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