AN ADVANCED VOLUME for classes in statistics is often difficult to define. What are advanced and what are basic statistics? In our Basic Statistics in Criminology and Criminal Justice, we covered materials that would generally be taught in introductory statistics classes at the undergraduate level and first semester Master’s level.We dealt with measurement, basic descriptive statistics, and statistical significance. We also laid out the basic approaches for modeling association between variables. While many important studies use these approaches, researchers often encounter problems that need more advanced statistical solutions. Such solutions are the focus of this volume.