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The effects of policy changes are often more nuanced than simple economic models suggest.
政策变化的影响往往比简单的经济模型所暗示的更为微妙。
Without models, we would be wandering in the dark when it comes to predicting climate change.
And what I noted, since the really big ideas carry 95 percent of the freight, it wasn’t at all that hard for me to pick up all the big ideas and all the big disciplines and make them a standard part of my mental routines. Once you have the ideas, of course, they are no good if you don’t practice. You don’t practice, you lose it.