A Social Demographer, Dr. Johnson continues research on her career-long interests in the social inequalities in fertility, infertility, comorbidity, disability, mortality, and migration that are created by gender, education, race, religion, and rural/urban residence. She has studied these phenomena with data from the U.S., Japan, the Philippines, Pakistan, and India and has travelled in all of those nations. Her publications appear, inter alia, in the American Journal of Sociology, Demography, Social Biology, Sociological Analysis, Population Studies, Rural Sociology, and the Journal of Rural Health. She has spent sabbaticals as a Visiting Professor at Xavier University (Philippines), the University of Michigan, and Florida State University. Dr. Johnson is a Fellow of the American Association for the Advancement of Science.