A Note on the Quadratic Expenditure Model
推导了一个基于效用的需求方程系统的一般形式，该系统的收入项为二次形式，系数是价格的函数，结果比已知的更一般化。
In this note we derive the general form of a utility based system of demand equations that are quadratic in income with coefficients that are functions of prices.Our result turns out to be slightly more general than known till now.