That situational factors affect officers' decisions to make arrests is well supported by empirical evidence; that officers' behavior is shaped by their attitudes and values is a common assumption even though it is supported only by weak empirical evidence. This analysis indicates that the theoretical utility of situational variables is limited for the most part to the arrest decision: situational factors have modest effects on officers' choices among informal actions. Furthermore, the analysis shows that attitudinal variables fail to account for more than a very small part of the variation in behavior. A theoretical perspective on police behavior as administrative decisionmaking is consistent with these findings, and might redirect future research along more fruitful lines. 5 tables, 97 references. (Publisher abstract)