The outlook is dim for Americans without college degrees

https://www.economist.com/finance-and-economics/2019/01/10/the-outlook-is-dim-for-americans-without-college-degrees

Inequality and Median Income

https://www.nytimes.com/2019/02/24/opinion/income-inequality-upper-middle-class.html

https://www.recode.net/2018/4/30/17301264/how-much-twitter-google-amazon-highest-paying-salary-tech