http://www.theatlantic.com/business/archive/2013/07/how-not-to-help-the-poor-the-lesson-of-soaring-college-prices/277658/
As more schools have adopted the high-tuition, high-aid model, prices have gone up for low-income and high-income students alike. The reason is simple: Tuition is going up faster than aid. In the end, low-income students -- as well as middle- and upper-income students -- face much better prices at schools that keep total price low across the board. As Edward St. John and Douglas Priest wrote a few years ago in Inside Higher Ed, "The reality of high-tution/high-aid did not match the vision advocated by progressives."
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The model is not high-tuition, high-aid. It's just high-tuition.