Antitrust Article on page III-30:
a.    Association of Family Practice Residency Directors restricts competition among its members for family practice medical residents.
b.    The Justice Department sued the association b/c doctors offered an economic incentive to bribe residents to come to their particular problems.  The Justice Dept disliked this idea b/c it would restrict competition among the hospitals and residency programs.
c.    In some ways, these programs are monopolistic, and care out antitrust activities.  But if the activity relates specifically to educational issues, the courts are less likely to frown on them, than if it is economic.