Dr. Gaspar concentrates on comparative slave systems, with a special interest in the development of slave society and the evolution of slave life in the United States and the Caribbean. The Atlantic Slave Trade,
Atlantic history and culture, the legacy of slavery in post-slave societies, historical geography, colonial British America, and Caribbean and Afro-American history are also fields of major interest. He has published articles on slave resistance and social control. His study, Bondmen and Rebels: A Study of Master-Slave Relations in Antigua, was published by the Johns Hopkins University Press, and he co-edited More than Chattel: Black Women and Slavery in the Americas, published by Indiana University Press. He is currently working on transitions in patterns of slave revolt in the Caribbean and North America.