这个计算好像课上没有讲过，可以解释一下吗？

嗨，爱思考的PZer你好：

同学你好，原版书对national income的表述如下：

The income received by all factors of production used in the generation of final output. National income equals gross domestic product (or, in some countries, gross national product) minus the capital consumption allowance and a statistical discrepancy.

而undistributed corporate profits可以认为是一个调平项

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加油吧，让我们一起遇见更好的自己！