Her research focuses on the intersections of health and wealth disparities across the life course, especially through the mechanism of family caregiving. Through her research, Dr. Greenfield seeks to identify and test policy interventions that best support families as they balance employment and caregiving. She has testified before numerous state legislative committees and her work has been cited in a variety of media outlets, particularly related to paid leave and minimum wage policy initiatives. Her research has been supported by the John A. Hartford Foundation, the Center for Retirement Research, and the National Association of Social Workers Foundation.