Economics video [10:14] examines the economic concepts of price control, subsidies and efficiency and discusses the role of government in the economic process.

A video lecture explaining how instituting a price ceiling lower than the equilibrium price reduces the total surplus (dead weight loss). [11:27]

This video [4:03] discusses the stock price behavior after announced acquisition with shares. The acquiring company's stock price tends to drop while the target company's stock price will rise.