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Research in the Ramachandran lab addresses problems in population genetics and evolutionary theory, generally using humans as a study system. Our work uses mathematical modeling, applied statistical methods, and computer simulations to make inferences from genetic data. We answer questions like: what demographic processes characterize the human diaspora out of Africa? did people migrate more rapidly across Eurasia or the Americas? does genetic variation account for some ethnic disparities in disease incidence and outcome? what features of human demographic history can we infer from cultural traits alone?