class, and a place to meet spouses of similar status". Especially among students who move away from their families to attend residential-focused four-year colleges, the experience of going away to college is seen as a rite of passage that produces young adults, irrespective of what they might learn in a classroom. The loss of these non-classroom experiences was the basis for some lawsuits filed after most campuses closed due to the COVID-19 pandemic, and the desire for those experiences was one reason why schools were pressured to re-open campus life in the fall of 2020. In 2018, Universitas 21 (U21), the network of research-intensive universities, ranked the US first globally for overall higher education, but only 15th when GDP was factored into the equation. Accounting for GDP, the top 10 nations for higher education in 2018 were Finland, the United Kingdom, Serbia, Denmark, Sweden, Portugal, Switzerland, South Africa, Israel and New Zealand. Strong research funding helped 'elite American universities' dominate global rankings in the early 21st century, making them attractive to international students, professors and researchers. Other countries, though, are offering incentives to compete for researchers as funding is threatened in the US and US dominance of international tables has lessened. The system has also been blighted by fly-by-night schools, diploma mills, visa mills, and predatory for-profit colleges. There have been some attempts to reform the system through federal policy such as gainful employment regulations, particularly through the Department of Education's College Scorecard, which enables students to see the socio-economic diversity, SAT/ACT scores, graduation rates, and average earnings and debt of graduates at all colleges. According to Pew Research Center and Gallup poll surveys, public opinion about colleges has been declining, especially among Republicans and the white working class. The higher education industry has been criticized for being unnecessarily expensive, providing a difficult-to-measure service which is seen as vital but in which providers are paid for inputs instead of outputs, which is beset with federal regulations that drive up costs, and payments coming from third parties, not users. In a 2018 Pew survey, 61 percent of those polled said that US higher education was headed in the wrong direction. A 2019 Gallup survey found that, among graduates who strongly felt a purpose in life was important, "only 40 percent said they had found a meaningful career after college." Types of colleges and universities US colleges and universities offer diverse educational