A happily ignorant economist. California is perpetually portrayed as suffering from a shortage of water. Case in point: Gov. Arnold Schwarzenegger recently declared a statewide drought, telling citizens to prepare for rationing. But the state's problems are not a result of too little water. The real problem is that the price of water in California, as in most of America, has virtually nothing to do with supply and demand. Although water is distributed by public and private monopolies that could easily charge high prices, municipalities and regulators set prices that are as low as possible. Underpriced water sends the wrong signal to the people using it: It tells them not to worry about how much they use. . . I propose a system where every person gets the first 75 gallons, or 1.5 bathtubs, per day for free but pays $5.60 for each 75 gallons after that. Under my system, the monthly bill for the average household of three...