Economic theory gives only the roughest guide to this pruning. It points out, for example, that supply rises when prices increase. But does it rise in a straight line or curve upwards?
同时在简化的过程中，经济理论只提供了一些最粗略的参考，比如当价格上涨时供给会增加，但是供给究竟沿什么样的轨迹增加呢？
Economic theory gives only the roughest guide to this pruning. It points out, for example, that supply rises when prices increase. But does it rise in a straight line or curve upwards?
同时在简化的过程中，经济理论只提供了一些最粗略的参考，比如当价格上涨时供给会增加，但是供给究竟沿什么样的轨迹增加呢？
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