The framework relies on an often-used analytical shortcut: identifying a limited set of explanatory variables in what statisticians call “a reduced-form equation.” The objective is not to account for everything, but rather to pinpoint a small number of variables than can explain key factors, albeit neither perfectly nor fully.
这个分析框架基于一个常用的分析捷径：在统计学家所谓的“方程简约式”中定义数量有限的几个解释变量。虽然不一定完美也不够全面，但这样做的目的不是要解决所有问题，而是准确找出一小部分可以用来解释关键因素的变量。