Evaluation of Police Efficiency in Japan : Validation Using Data of the Detection of Crimes and Corruption Occurring in the Police Organization

As described herein, using panel data of prefectural police departments during 2005–2019, which are available as data, we conducted a police efficiency assessment using DEA. DEA is useful for conducting efficiency evaluations using multiple inputs and multiple output variables simultaneously. Then the factors affecting efficiency can be analyzed. Empirical analyses revealed the police officers’ salary compensation as a factor affecting police organizations’ efficiency. Police organizations that experience corruption, especially bribery and embezzlement to obtain money, might be less efficient. Moreover, salary compensation effects on efficiency can be expected to be strong. In light of the points above, we regard the pay level as an important factor when considering police organizations’ efficiency.