While much research focuses on factors contributing to doctoral completion, few studies explore the role of the doctorate in forming active researchers with the skills, know-how and appetite to pursue research post-completion. This article investigates 15 existing studies for evidence of what factors in the doctoral experience may contribute to the formation of an active researcher with a capacity for later research productivity. The analysis reveals a productive advisor may be key to forming an active researcher and, although inconclusive, productivity post-completion. Further detailed research is required, however, into how the advisor influences candidates' productivity. The article also points to other potentially influential factors requiring further investigation, such as: developing collaborative capacities, conceptualising the purpose of the doctorate as forming an active researcher, advisor mentoring and fostering emotional engagement with research.