Okay. If you look at the research evidence -- that's extensive -- on how much early childhood programs affect the educational attainment, wages and skills of former participants in preschool as adults, you take those known effects, you take how many of those folks will be expected to stick around the state or local economy and not move out, and you take research on how much skills drive job creation, you will conclude,
如果你翻阅研究资料—— 这方面的研究已经很多——关于学龄前教育计划 如何对参加过学龄前教育的人的 教育程度，薪水和技能的影响， 我们把这些影响综合起来， 估算一下接受学前教育的人有多少大的比例 会留在当地的经济圈中，没有搬走 再考虑到通过学龄前教育提高的劳动技能 促进创造了多少就业机会，你就会得出结论，