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. 1993 Fall;15(1):55–69.
Yt = service units per enrollee
TIME = time variable (coded 0,1,2,3…N)
ENROLL = binary variable measuring difference in utilization during enrollment relative to pre-KenPAC (coded 1 if enrollment period; 0 if otherwise)
POST = binary variable measuring difference in utilization during post-KenPAC relative to pre-KenPAC (coded 1 if post-period; 0 if otherwise)
SEASON = binary variable measuring difference in utilization during winter (coded 1 if December, January, or February; 0 if otherwise)