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DOI: 10.1177/0193841X7900300103 Crime Trends and Police ExpendituresAn Investigation of the Lag StructureNortheastern University All previous investigations into the effect of crime trends on appropriations for police protection have employed either inappropriate cross-sectional data or unrealistic singular lag structures. The model developed here involves a more reasonable lag structure and is estimated with time series data. The expenditure for police appears as a function of the crime rate with a lag structure that begins at two years, that contains geometrically declin ing coefficients, and that has a mean lag of 3.9 years.
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