Labor Productivity in Retailing: What Do We Know and How Do We Know It?
回应了Hughes和Serpkenci对Ingene（1982）的评论，讨论了比率变量的使用，重新定义变量与假设关系，并用两种统计技术估计劳动生产率的决定因素，结果支持原假设。
This article is a response to the comments of Hughes and Serpkenci (1985) on Ingene (1982). The measurement model used in the 1982 article is discussed, with reference to Hughes/Serpkenci's comments, and a perspective is provided on the use of ratio variables. In light of the preceding, some of the variable/hypothesis relations are reconceptualized and redefined. Two statistical techniques are then used to estimate the determinants of labor productivity, and substantial support is found for the hypotheses. Accordingly, there is no reason to doubt the validity of the substantive interpretations contained in this and the original article.