上海交通大学：《系统思考与科学决策 Systems Thinking and Scientific Decision-making》课程教学资源（讲义）Lecture 1 Systems Thinking and Scientific Decision-making

Bring Back DDT? http://www.21stcenturysciencetech.com/articles/summ02/DDT.html

http://www.21stcenturysciencetech.com/articles/summ02/DDT.html Bring Back DDT？！

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Policy Resistance Goal:Cut medical costs Policy:Managed-care programs require or encourage doctors to prescribe drugs- especially less expensive generics-from approved lists called "formularies' LA Times,3/20/96

Policy Resistance Goal: Cut medical costs especially less expensive generics— from approved lists called “formularies” LA Times, 3/20/96 Policy: Managed-care programs require or encourage doctors to prescribe drugs —

Policy Resistance Result: “.the practice e of tightly restricting access to drugs sometimes means the most effective drugs aren't used,resulting in longer illnesses,more visits to doctors and hospital emergency rooms and even greater overall drug use.” LA Times,3/20/96

Policy Resistance Result: “...the practice of tightly restricting access to drugs sometimes means the most effective drugs aren't used, resulting in longer illnesses, more visits to doctors and hospital emergency rooms and even greater overall drug use.” LA Times, 3/20/96

Policy Resistance Result:"...requiring the use of cheaper or generic prescription drugs ultimately drives the cost of medical care up,not down." LA Times,3/20/96

Policy Resistance the cost of medical care up, not down.” LA Times, 3/20/96 Result: “...requiring the use of cheaper or generic prescription drugs ultimately drives