类似地，幂指数定律模式也可在美国1919 - 2009年1月间的工业生产的月度摆动(绝对值)频率和级别中被发现(表2)。

Similarly, the power law pattern can be seen in the frequency and magnitude of the monthly swings, positive and negative, in us industrial production from 1919 to February 2009 (Exhibit 2).

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摆动是每天基于品项(件数，单元数)百分比变化差的绝对值。

Swing is the absolute value of day to day percentage change based on items (pieces, or units).

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