Selection Bias Selection bias occurs when the selection of participants in one group results in a different outcome than the selection for the other group
1 As of 2015, there are more than 96,000 osteopathic medical physicians in the United States.  By 2020, the number of osteopathic medical physicians will be over 100,000, say expert predictions, according to the American Medical Association.
Market-driven estimates of the optimal distribution of specialists within the overall supply of physicians have generated further debate. According to the Council on Graduate Medical Education, from 85 to 105 specialists and from 60 to 80 generalists will be required per 100,000 members of the population in the future.