Teaching Exceptional Children: Assessing and Modifying Social Behavior By - P.S. Strain, T.P. Cooke and T. Appolloni Academic Press: New York, 1976, VIII + 152pp.; £6.30.

private market to respond to money-backed demand results in "maldistribution of resources, risks for the quality of some services, the provision of excessive, unnecessary and ineffective services, an inflation of costs and a general distortion of health priorities" in developing and in developed countries. Merely spending more money on health services by itself does not generate better health for the country concerned. Some investment in social services may be as important as in health services.