现在的价格比两年前提高约一半。
The cost is about half as much again as it was two years ago.
是的，夸大的房屋价格和抵押贷款业的愿意借钱给任何人一个脉冲对危机的必要前提。
Yes, the inflated price of homes and the mortgage industry's willingness to lend to anybody with a pulse were necessary prerequisites for the crisis.
原则上来说，如果这类税符合税收的一般准则，即能够在不对价格信号和企业造成大的损害的前提下增进价值，那么它们的确是有用的。
In principle such levies are useful if they meet the test for taxes: to raise revenue without harming price signals and enterprise too much.
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