Handling problems of ecological fallacy in program planning and evaluation.
D000704:Analysis of Variance; D002391:Catchment Area, Health; D005069:Evaluation Studies as Topic; D006301:Health Services Needs and Demand; D006302:Health Services Research; D008605:Mental Health Services / Q000706:statistics & numerical data*; D009519:New York City; D012959:Socioeconomic Factors