0.26 Florenz Plassmann T. Nicolaus Tideman, Does the Right to Carry Concealed Handguns Deter Countable Crimes? Only a Count Analysis Can Say, Journal of Law and Economics, 2001.

{ variable coefficient model regression }	0.37
{ crime rate arrest police }	0.26
{ percent data table effect }	0.19
{ state law federal year }	0.07

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