The title of this blog post would be a slightly more accurate (if less catchy) title for this excellent Slate article by Matt Yglesias, suggested to me by your classmate Jud Winton. The article's economic analysis of the pricing reaction of retailers in disaster zones is spot on. Not only is demand for some emergency products likely to rise steeply around the time of disasters, justifying upward pressure on prices, but supply is also likely to contract due to disruptions in the supply chain. The latter force also creates the basis for increased prices. Thus, not changing prices on the occasion of a major disaster could result in severe shortages.
You might ask (as Jud did) whether higher prices during disasters might have adverse distributional consequences: after all, at the higher prices only relatively rich people may be able to afford emergency supplies. But you also need to ask: adverse distributional consequences compared to what? During disasters, an unlimited supply of emergency goods at reasonable prices is not available (otherwise, the market reaction would not be for prices to rise!). The plausible alternative, here, is a shortage of goods due to prices that are too low. Next, ask yourselves: what is more fair or just: to have markets clear on the basis of willingness to pay, or to allocate goods on the basis of whoever shows up first, leaving latecomers without the opportunity to purchase anything?
This case illustrates the hard economic reality that we do not live in a world of unlimited resources, where all can enjoy the unlimited bounty of unlimited supply. We need to make difficult allocation choices for scarce resources. Whether these allocation choices should be made on a first-come, first served basis, or on the basis of a well-functioning price system, is not an obvious issue. There is a good case to be made that first-come, first-served allocation is grossly unfair compared to the market-based alternative. What is certain is that with a flexible price system, supply will equilibrate with demand and nobody will be left wanting more goods at market prices.
Politicians can sound convincing when they call for price regulations to avoid so-called "price gouging". A little bit of economics demonstrates that things are not so simple.
Incidentally, the next module in our course will be devoted to examining precisely this type of problem.