在線性需求函數條件下，對將需求量區間等分的最優定價方法和按固定折扣率定價的方法在區間分段和壟斷廠商多獲取消費者剩余方面作了比較分析。研究結果表明，按固定折扣率定價時需求區間將按先寬后窄的順序分段(第一區間除外)；而兩種定價方法使壟斷廠商獲取的消費者剩余基本相同。
關 鍵 詞 線性需求; 等分需求區間定價; 固定折扣率定價; 二度價格歧視

Abstract We have analyzed comparatively the optimum pricing of dividing up demand interval equally and pricing of fixed discount ratio on the aspects of division of interval and the consumer’s surplus which be gained by a monopoly enterprise. The conclusions are as the following: the demand interval will be divided up by this means that a front interval is longer than a hind interval (the first interval is exceptional) if we price under fixed discount ratio; the two pricing method will both make a monopoly enterprise gain equal consumer’s surplus on the whole.
Key words linear demand; pricing of dividing up demand interval equally; pricing of fixed discount ratio; second-degree price discrimination