Abstract
This paper is a first attempt to organize and codify the findings of quantitative research on four aspects of police behavior: detection, arrest, service, and violence. A framework of five explanatory approaches is used to organize the findings: individual characteristics of police officers; situational, organizational, and community characteristics; and legal variables. The findings generally show weak relationships between a wide range of the hypothesized causes and police behavior, the implica tions of which for building a substantive theory of policing are briefly considered.