compare the experiences. a big peer review literature that looks at that. one is coming out in the american economic review. we say if this is true, what wage effect you get. most of the action is north of $4,000. that's where the number comes from. i'll go in the middle. >> one of the criticisms, kevin, of the tax reform proposal is that the corporate tax rate is cut permanently. the individual tax rate phases out after ten years. why is that such a good idea? >> so the president supports permanent tax cuts for the middle class and permanent tax cuts for corporations. that's the objective of the planners of this tax bill. but they're also senate budget rules and reconciliation rules that are required to allow this bill to move forward with 51 votes. the hope for everybody is that when the time comes for these things to expire that they get