Dr. Weir is a Research Professor in the Survey Research Center at the Institute for Social Research and Director of the Health and Retirement Study (HRS).  He has led the transformation of the HRS into a world-leading biosocial survey combining its traditional excellence as a longitudinal survey with direct biological measures of health, genetics, linked medical and long-term care records from the Medicare system, and enriched psychological measurement.  His research increasingly includes comparative analyses from the international family of HRS studies that now cover more than half the world’s population.