“vertical product differentiation”的概念、定义、翻译、参考文献-科学参考

单词	vertical product differentiation
释义	vertical product differentiation Encyclopedia 经济学产品差异化释 vertical product differentiation垂直产品差异化企业以某种方式改变产品质量，以使消费者相信产品存在差异而产生不同偏好的做法。
随便看	variance between laboratories variance component variance component model variance component models variance-covariance analysis variance-covariance component estimation variance-covariance matrix variance-covariance propagation law variance estimation variance functon variance inflation factor variance matrix variance of an estimator variance of a probability distribution variance of a random variable variance of unit weight variance per unit weight variance ratio variance ratio test variance reduction Variance-sociolinguistics（Variation socialinguistics, Variationist socialinguistics） variance-stabilizing transformation variance swap variance test variance within classes

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