This book describes various types and sources of crime and explanatory data available to study variation in crime across nations. Problems with the data and appropriate methods for adjusting and analyzing the data are described. A thorough review of theories and past cross-national crime research is included. This book intends to facilitate and stimulate quality cross-national crime research. The book notes past misuse of data, such as using homicide rates unadjusted for attempts, as well as inconsistencies and contradictions in past research. The major theories and concepts which have been used to explain crime across nations are described in detail and critiqued. Inconsistencies and contradictions in results are noted, and avenues for future research are offered. Methodological techniques, issues, and problems involved in analysis are also presented and new approaches to dealing with the resulting data are projected. Extensive appendixes give information and contacts to researchers, providing a network for research in cross-national crime heretofore lacking.