李明珠的文章也显示了另一个由谷物价格引发的理论问题，即如何定义和界定市场。
Another theoretical problem raised by the grain price data, also illustrated in Li's article, is that of how to define and identify markets.
FTC狭隘的界定夸大了失去竞争对价格可能造成的影响但忽视了来自普通超市较间接的挑战。
The FTC’s narrow definition played up the likely effect on prices from the loss of that rivalry but ignored the more distant challenge from ordinary supermarkets.
如果是这样的话，价格改如何界定？甲骨文怎样避免同自身的低端数据库发生冲突？
And if so, when, at what price and how would [Oracle] avoid cannibalizing [its] low-end, half-rack Oracle database machine running on Sun?
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