THIS week's interesting new economics research:

The impact of college education on geographic mobility (Ofer Malamud, Abagail Wozniak)

Productivity and the density of human capital (Jaison Abel, Ishita Dey, and Todd Gabe)

Small business lending in low-income neighborhoods during the financial crisis (Elizabeth Laderman and Carolina Reid)

The employment report and displaced workers (Tim Dunne and Kyle Fee)

Why isn't Mexico rich? (Gordon Hanson)