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The art of economics consists in looking not merely at the immediate but at the longer effects of any act or policy; it consists in tracing the consequences of that policy not merely for one group but for all groups.
经济学的艺术不仅在于观察任何行为或政策的直接影响，而且在于观察其长期影响;它不仅包括对一个集团，而且包括对所有集团追查这项政策的后果。