Twenty years ago, the study of sexual harassment focused on whether or not sexual harassment was a social problem worthy of study and on descriptive analyses of its prevalence. In recent years, research has shifted to more sophisticated empirical and theoretical analyses of the causes and consequences of this phenomenon. Research now exists that attempts to answer many of the fundamental questions surrounding sexual harassment: What is sexual harassment? How prevalent is sexual harassment? What are the predictors of sexual harassment? And what are the responses to and consequences of sexual harassment? This review outlines the major accomplishments in this field, some of its pitfalls, and research directions for the future.