Center for Large Data Research and Data Sharing in Rehabilitation Education & Training Resources All Activities Education & Training All Online Learning Activities Online Learning Accessing Data Analyzing Data Archiving and Sharing Data All Activities Other Links & Resources 2012.07.01 - Video: Use of Geographic Variation to Estimate Effectiveness With Nonrandomized Data Use of Geographic Variation to Estimate Effectiveness With Nonrandomized Data July 2012 Comparative Effectiveness Research with Population-Based Data Conference, Baker Institute at Rice University. Presented by Mary Beth Landrum, PhD, Harvard Medical School.