This can be rational behaviour if investors think that everyone else will do the same.

如果投资者认为所有人都会采取同样做法，这可能是理性的。

youdao

The result of such individually rational behaviour is a housing and credit boom, followed inevitably by a nasty bust.

结果，个人的理性举动造成了房产和信贷繁荣，随之又不可避免地再来惨痛崩溃。

youdao

No animal's behaviour is controlled by moral principles. Generally speaking, they do not rise from instinctive behaviour to rational behaviour.

没有一种动物的行为是依据道德原则进行的。一般来说，动物的行为不能从本能的行为升华为合理的行为。

youdao

That is because they are designed assuming rational behaviour, whereas markets have a nasty tendency to react unpredictably.

ECONOMIST: Financial markets: Copy the lowly cockroach | The

The other thing is that the 20th century did not stand out as a century in which rational behaviour triumphed.

BBC: News | Back to the future | John Mohawk

He and Morgenstern may have been the first to show how the philosophical idea of rational behaviour could be applied to economics.

ECONOMIST: John Harsanyi