Answer:

1.According to the researchers' analysis of U.S. Census, Bureau of Labor Statistics and National Center for Education Statistics data for the years 1980 to 2019, college costs have increased by 169% over the past four decades — while earnings for workers between the ages of 22 and 27 have increased by just 19%.

2.The proximate causes of tuition inflation are familiar: administrative bloat, overbuilding of campus amenities, a model dependent on high-wage labor, and the easy availability of subsidized student loans.