[1] During her doctoral studies, her research began to center on the intersections of race, immigration, and political behavior within the black community in the United States.

[2] In 2013, Greer published her first book, Black Ethnics: Race, Immigration, and the Pursuit of the American Dream, with Oxford University Press.

[2] Greer examines how both ethnicity and a shared racial identity shape the political preferences and policy choices of black Americans.

[2] In addition to her work on black ethnic politics, Greer has conducted research on the history of African Americans who have run for executive offices in the United States.

[2] She is also studying the roles of mayors and public policy in urban centers, examining how political leadership influences the governance of cities.