Both incentives and punishments elicit powerful responses.

你有没有为将来打算过呢？

在数学中，真理总是相对于你所在的系统而言的。

译文：行善有真的，有假的；有直的，有曲的；有阴的，有阳的；有是的，有非的；有偏的，有正的；有半的，有满的；有大的，有小的；有难的，有易的。所以，要仔细辨别。如果行善不了解行善的道理，就自认为是在行善，不但没有功德，还可能是在造孽。不仅受冤枉、枉费苦心，还没有一点好处。

Every decision we make in fisheries management echoes through the entire marine ecosystem.

I cannot fix on the hour, or the spot, or the look, or the words, which laid the foundation. It is too long ago. I was in the middle before I knew that I had begun.

A building must be a gift to the city.

The beauty of instrumental variables is that they allow us to see the world in a new light.

The system produces needs faster than it can satisfy them, and thus it perpetuates itself.