This study represents a modified replication of the Minneapolis Domestic Violence Experiment (SPECIFIC DETERRENT EFFECTS OF ARREST FOR DOMESTIC ASSAULT: MINNEAPOLIS, 1981-1982 [ICPSR 8250]). The Minneapolis study found arrest to be an effective deterrent against repeat domestic violence. The two key purposes of the current study were (1) to examine the possible differences in reactions to arrest, and (2) to compare the effects of short and long incarceration associated with arrest. Research protocol involved 35 patrol officers in four Milwaukee police districts screening domestic violence cases for eligibility, then calling police headquarters to request a randomly-assigned disposition. The three possible randomly assigned dispositions were (1) Code 1, which consisted of arrest and at least one night in jail, unless the suspect posted bond, (2) Code 2, which consisted of arrest and immediate release on recognizance from the booking area at police headquarters, or as soon as possible, and (3) Code 3, which consisted of a standard Miranda-style script warning read by police to both suspect and victim. A battered women's shelter hotline system provided the primary measurement of the frequency of violence by the same suspects both before and after each case leading to a randomized police action. Other forms of measurement included arrests of the suspect both before and after the offense, as well as offenses against the same victim. Initial victim interviews were attempted within one month after the first 900 incidents were compiled. A second victim interview was attempted six months after the incident for all 1,200 cases. Data collected for this study included detailed data on each of the 1,200 randomized events, less detailed data on an additional 854 cases found ineligible, "pipeline" data on the frequency of domestic violence in the four Milwaukee police districts, official measures of prior and subsequent domestic violence for both suspects and victims, interviews of arrested suspects for eligible and ineligible cases, criminal justice system dispositions of the randomized arrests, results of urinalysis tests of drug and alcohol use for some arrestees, and log attempts to obtain interviews from suspects and victims. Demographic variables include victim and suspect age, race, education, employment status, and marital status. Additional information obtained includes victim-offender relationships, alcohol and drug use during incident, substance of conflict, nature of victim injury and medical treatment as reported by police and victims, characteristics of suspects in the Code 1 and 2 arrest groups, victim and suspect reports of who called police, and victim and suspect versions of speed of police response.