Dummy_Variables

Last updated Feb 10, 2022 Edit Source

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Dummy variable (statistics) - Wikipedia

In statistics and econometrics, particularly in regression analysis, a dummy variable is one that takes only the value 0 or 1 to indicate the absence or presence of some categorical effect that may be expected to shift the outcome.

Dummy Variable 里面的Dummy可不是傻子的意思, 这里的Dummy的意思是"假的, 辅助的", 意思是这个变量仅仅用于表示某个因素存在与否, 而没有实际意义, 很类似于 Kronecker delta $\delta_{ij}$在线性代数中的应用.

一个实例可以很好的解释Dummy Variable的作用:

• Section 1

• Section 2