外生变量可以包括内生变量的后滞值。
Exogenous variables can include lagged values of endogenous variables.
每一个模型都包括需要估计的外生变量和内生变量。
Every model includes exogenous and also endogenous variables which must be estimated.
外生变量是模型本身不予以解释而是当成已知的变量。
An exogenous variable is a variable that is not explained by the model but rather is taken as given.
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