nondifferentiated products
对超市销售数据进行分析表明该方法简单、实用，而且得到一个有趣的结果：顾客对同一产品的不同品牌的选择是没有差别的。
Then analysis for the sale data of supermarket indicates that the method is fine, and a nice result that customs choice is same to different bland of one product is received.
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