There are very few -- if any -- legal, unregulated markets of this size.

所以Nike球鞋肯定不是股票交易。

The problem here is that unregulated markets sometimes don't produce the outcome that society wants.

问题是，不受监管的市场有时不会产生社会想要的结果。

The Nobel committee said that unregulated markets often produce socially undesirable results.

诺贝尔委员会表示， 不受监管的市场往往会产生社会不受欢迎的结果。