Collins’ research examines the production and consequences of social inequality. Her current research explores gender inequality in the workplace and in family life. A book based on this research, Making Motherhood Work: How Women Manage Careers and Caregiving was published February 2019 with Princeton University Press. Her research for the book included a cross-national interview study of 135 working mothers in Sweden, Germany, Italy, and the United States. These four countries offer distinct policy approaches to reconciling work-family conflict. She examine how different ideals of gender, motherhood, and employment are embedded in these policies, and how they shape the daily lives of working mothers in these countries. Her research is supported by the National Science Foundation, American Association of University Women, and German Academic Exchange Service (DAAD).