Local companies don't have to internalize their costs, and few actually do, but they tend to more often because the owners live there and they have to show their face in town, and their kids play with other kids.
当地公司不需要将成本内部化，实际上也很少这样做，但他们往往会这样做，因为业主住在那里，他们必须在城里露面，他们的孩子和其他孩子一起玩耍。
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