So for example, numerous research studies have shown if you look at what really drives the growth rate of metropolitan areas, it's not so much low taxes, low cost, low wages; it's the skills of the area. Particularly, the proxy for skills that people use is percentage of college graduates in the area.
举个例子，众多的研究显示 如果你查看到底是什么驱动着 都市地区的增长率 并不是低税率，低成本，低工资 是这个地区的技术。特别是 当地高校毕业生的比例