This report presents a review of studies and articles on employer-sponsored training in Canada. The authors reviewed documentation that used data from the Workplace and Employee Survey (WES) and offer a synthesis of the current state of knowledge. The report looks alternately at issues pertaining to determinants of training from the employer and employee perspectives. From each perspective, summarized results are presented regarding returns on training, their variability across industries, occupations and other characteristics, key barriers to training, and the types of training and supports that are provided by the employer. Knowledge gaps are identified. An appendix includes Synthesis Tables of the Results. (Contains 2 footnotes and 3 tables.) [This report was prepared for the Learning Policy Directorate, Strategic Policy and Research, Human Resources and Social Development Canada and is available in French under the title: "La formation parrainee par les employeurs au Canada: Synthese de la documentation a l'aide de donnees extraites de l'Enquete sur le milieu de travail et les employes."]