And although one CD looks much like another, music is a gloriously “differentiated” product, so firms cannot infer what their rivals are doing from their own sales data.
And although one CD looks much like another, music is a gloriously “differentiated” product, so firms cannot infer what their rivals are doing from their own sales data.
虽然每个CD看起来都很相似，但里面的音乐却是华丽的“差异性”产品，所以唱片公司从自己的销售数据上无法推断他们对手的做法。