In making a precise evaluation of determining the criminal control strategy's success or failure, crime displacement effects and diffusion effect of crime control have been the main subject of research. Furthermore, It has been a very difficult proble...
In making a precise evaluation of determining the criminal control strategy's success or failure, crime displacement effects and diffusion effect of crime control have been the main subject of research. Furthermore, It has been a very difficult problem valuating a mutually opposite effects in the same time. However, it seems that the WDQ (Weighted Displacement Quotient) formula which was designed by Bowers and Johnson in 2003 is an useful mean to assess the effects of crime control program. In this inquiry, the principle, analysis process and analytical method of WDQ formula is being introduced. In addition, through many kinds of instances which were applied to WDQ, the possibility of being applied to the evaluation of criminal control strategy was scrutinized. First, for the WDQ applied research, Bowers and Johnson's inquiry was introduced and previous researches were rearranged by the standard of analytic method of microscopic-level and macroeconomic-level. Macro-economic-level research means the level of analysis data that use an unit of a wide area like an administrative district as the establishment of control area like experimental area and transitional area, and macro-level research is establishment of each area that established in a residence unit or area within less than radius of 100m. Through this standard, some limitations in classification process of the inquiry instances were pointed out, and the matters that require attention in using WDQ formula was mentioned. ① The pertinent establishing range of experimental area and buffer area should be confirmed. ② The establishing shape of an experimental area and buffer area should go through a reasonable judgment. ③ The practical application of geographical analytic method should be considered. ④ For the rate of a crime which used as an analysis index, the inquiry subject should be considered. ⑤ It is useful to have an analysis about the types of a crime. ⑥ The interpretation of an analysis result from focal points of the researchers should be done precisely. The practical use of WDQ formula is not active yet, but, as an useful mean of evaluating crime control strategy, it has a very high application value, so it will be beneficial to have a further research in this area after all.