Submit a photograph that exemplifies one of the topics we've seen in class, such as Opportunity Cost, Comparative Advantage, Supply & Demand, Equilibrium, Elasticity, Taxes & Subsidies, Deadweight Loss, Price System, Great Economic Problem, Signals, Futures, Speculations and Arbitrage. The picture can be staged, or you can photograph something you encounter in your daily life.

The ideal submission is something that could a) be suitable for use in one of my slide decks or a textbook b) works visually without a caption, or perhaps just a few words c) could make the concept clear for somebody wo hadn't understood it previously.