In a small Mexican town, some of the locals do not walk but crawl towards the shrine of Santa Muerte. This behavior is a perfect example of how cultural norms create markets, in this case for knee and elbow guards. There is no government authority dictating that people buy the guards or that people sell them, but it happens organically. What other items do you think would be popularly sold along this passageway?
See more: exchange, invisible hand, markets, needs, social norms, wants
The Economics of Breaking Bad 