We see that although the weekly income of college graduates also witnessed a constant increase, from $80 in 1975 to $150 in 2005, the growth margin was far smaller than that of high school graduates.

我们看到，虽然大学毕业生的周收入也一直在增长，从1975年的80美元增加到了2005年的150美元，但是增幅上远低于高中毕业生。

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As a result, the firm's net income fell by half in the year, leaving it with a thin profit margin of 2.2%.

因此，该店年纯收入跌了一半，利润率仅为2.2%。

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And think of the amount this individual produces as depending on effort, which in turn depends on how much of his or her income the individual gets to keep at the margin, i.e.

再设想该个体的生产总量视同于其所付出的劳力，这一劳力转而又由其收入的多少决定，该收入为其所能留存的剩余量，即，1 - t。

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Well, the market hates to see margin compression, and the operating income margin contracted from 41 percent of revenues to 38 percent.

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Reduce income taxes at the margin and you'll get more income because people and companies will be more motivated to produce.

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But to boost output and income, a tax cut must be the right type -- one that cuts taxes "at the margin" on the additional income associated with additional output (supply).

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