Lichter has published widely on topics in population and public policy, including studies of concentrated poverty and inequality, intermarriage, cohabitation and marriage among disadvantaged women, and immigrant incorporation. His recent work has focused on changing ethnoracial boundaries, as measured by changing patterns of interracial marriage and residential segregation in The United States. He is especially interested in America's racial and ethnic transformation, growing diversity, and the implications for the future. His other work centers on new destinations of recent immigrants, especially Hispanics moving to less densely-settled rural areas. Lichter is a member of the research advisory board of the National Campaign to Prevent Teen and Unintended Pregnancy. He is also a policy fellow of the Carsey Institute at the University of New Hampshire, and a member of the poverty working group (on race and ethnicity) at the Stanford Center of Poverty and Inequality. He is currently serving as a member of the National Academy Sciences panel on "The Integration of Immigrants into American Society."