The Differentiation Triangle
研究了高质量和低质量产品子市场的差异，通过一个简单模型分析了企业在差异化三角中的价格竞争结果，并探讨了企业选择垂直产品线或利基策略的决策。
The paper formalizes the observation that submarkets for high‐quality and low‐quality variants are markedly different from each other. We study a simple model where variants of low quality cannot be horizontally differentiated, whereas customers disagree about the value of variants in the high‐quality range. We determine the outcome under price competition in the differentiation triangle with sequential entry when each firm can develop the vertical product line or decide to follow a niche strategy, i.e. to develop only one variant.