right to carry a gun is a debated issue in the United States. Supporters of gun rights argue that more guns are likely to deter crime,

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1. Panel Data

The right to carry a gun is a debated issue in the United States. Supporters of gun rights argue that more guns are likely to deter crime, while opponents believe that it might cause more crime given their wide availability. To investigate this issue we use a panel dataset of 51 US states (including DC) in the period 1977-2014 that includes the following variables:

Variable

stateid

year state vio

bur

mur

aga

pap

auto shall density

Definition

numerical (integer) state ID (Alabama = 1, Alaska = 2, etc.) 4-digit year (1977, 1978,..., 2010)

state name (string) ("Alabama", etc.)

violent crime rate (incidents per 100,000 members of the population)

burglary crime rate (incidents per 100,000)

murder rate (incidents per 100,000)

aggravated assault rate (incidents per 100,000) rape rate (incidents per 100,000)

motor vehicle crime rate (incidents per 100,000)

fraction of year state has a shall-issue law

population per square mile of land area, divided by 1000

real per capita personal income in the state

real per capita unemployment insurance payments in the state

rpcpi rpcui

rpcim

pbmAABB

real per capita government income support ("welfare") payments in the state percent of state population that is black male, ages AA to BB

pwmAABB

percent of state population that is white male, ages AA to BB

The dataset includes several measures of violence (vio,bur, mur, auto) while the variable of interest is shall which represents the fraction of the year that a state had a shall-issue law in place (that is, the law requires a license to carry a concealed handgun subject to specific criteria determined in the law).

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