C ancer survivorship research seeks to improve the physical, psychosocial, and economic outcomes of individuals who have a history of cancer. 1 For working-age adults with cancer, work impairment may be one of the most burdensome consequences of cancer. Inability to return to work after cancer treatment, frequent or prolonged work absenteeism, or problems with work performance may have substantial economic impact on the survivor and her or his family. [2][3][4][5] Changes in work also may have substantial impact on self-esteem, quality of life, and social or family roles. 6 -10 Finally, work performance after cancer treatment may be a measure of recovery in its own right.Despite its importance, the impact of cancer and its treatment on work has been studied infrequently. Spelten and colleagues reviewed the literature through 1999 and concluded that critical questions, such as the impact of different cancer sites on work and the extent of racial or socioeconomic disparities in work function after cancer, have rarely been addressed. 11 Furthermore, the existing literature rarely has identified remediable targets for intervention and has lacked rigorously tested intervention strategies to increase return to work or work function.More and better research on the work impact of cancer is necessary to inform the decisions of cancer survivors and their treatment providers. In this commentary, we examine the characteristics of research studies that may advance our understanding of this important clinical and social issue. To achieve this objective, we identify six methodologic attributes that provide the solid scientific knowledge necessary to inform interventions, evaluate existing studies in the light of these criteria, and propose a conceptual model to guide future research.