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经济学家间的分歧是有益的。这反映了一个事实:经济学是由多元化的模型组成的,匹配现实与模型是一项不完美的科学,很容易犯错。公众更应该直面这一不确定性,而不是沉溺于某些知识的外表所带来的虚假的安全感。芝加哥大学的全球市场计划,定期对一组政治观点各异的顶尖经济学家发起调查,询问他们对当前各种问题的意见。最近一期的问题是:奥巴马的刺激计划是否有助于美国降低失业。这一正式名为“2009年美国复苏和再投资法”的计划,包括政府投入8000多亿美元用于基础设施、教育、卫生、能源领域,税收激励,以及众多社会项目。
Disagreements among economists are good. This reflects the fact that economics consists of pluralistic models, that matching reality with models is an imperfect science and that it is easy to make mistakes. The public should confront this uncertainty more than the false sense of security brought by the appearance of certain knowledge. The University of Chicago’s global marketing plan regularly surveys a group of leading economists with diverse political views and asks them opinions on various current issues. The most recent issue is whether Obama’s stimulus package will help reduce unemployment in the United States. This formally named “2009 U.S. Recovery and Reinvestment Act” plan includes more than 800 billion U.S. dollars invested by the government in infrastructure, education, health, energy, tax incentives, and many social programs.