This final chapter summarizes the evidence and identifies remaining questions. It argues that obesity policy is as much a question of social choice as of biology. It gives the key points raised by the book. It claims that obesity poses a modern day challenge to understanding human health and welfare and that it may be due to technological change. Obesity policy needs economics for risk assessment and management. It also offers that obesity cannot be changed by information policy alone but with a combination of fat taxes and thin subsidies.
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