So although the number of terrorist attacks has fallen, and fewer people have been injured, the imputed economic benefits are limited-just a tenth of the costs.

因此，尽管恐怖袭击的数量已下降，受害民众也已更少，但估算出的经济效益仍是有限的——仅仅只有成本的十分之一。

youdao

The real benefits of home ownership are any capital appreciation, plus the imputed rent, minus the effective cost of the mortgage and property taxes, other costs, and the return you could earn on your down payment elsewhere.

WSJ: Why Your Mortgage Won't Make You Rich