What causes economic bubbles? - Prateek Singh

View full lesson: http://ed.ted.com/lessons/what-causes-economic-bubbles-prateek-singh During the 1600’s, the exotic tulip became a nationwide sensation; some single bulbs even sold for ten times the yearly salary of a skilled craftsman. Suddenly, though, the demand completely plummeted, leaving the tulip market in a depression. What happened? Prateek Singh explains the peak of a business cycle, commonly referred to as a mania. Lesson by Prateek Singh, animation by Simon Ampel.