Income inequality: It's a problem. Here's why. - CSMonitor.com
Income Inequality, Equality of Opportunity, and Intergenerational Mobility
Are You Better Off Than Your Parents Were? - The New York Times
Countries Where Intergenerational Income Mobility Is Better Than US
Rising Intergenerational Income Persistence in China
Intergenerational Income Mobility: New Evidence from Canada
Haq's Musings: Upward Income Mobility in Pakistan Better Than in India and Most Other Nations
Here is the source for the “Great Gatsby Curve” in the Alan Krueger speech at the Center for American Progress on January 12 – Economics for public policy
A Model of Intergenerational Mobility Variation over Time and Place Author: Gary Solon University of Michigan. - ppt download