We propose a measure of product substitutability based on correlation of common purchases, which is fast to compute and easy to interpret. In an empirical study of a drugstore retail chain, we demonstrate its properties, compare it to a similarly simple measure of product complementarity, and use it to find small clusters of substitutes.

翻译：我们基于共同购买的关联性提出了产品替代性标准,这一标准可以快速计算,易于解释。 在对一家药店零售链的实验研究中,我们展示其特性,将其与类似简单的产品互补性标准进行比较,并用来寻找小组替代品。