Incentives Matter Economists believe that changes in incentives influence human behaviour in a manner we can foretell. Benefits and costs that affect us influence our choices. If any choice gives us more benefits, we are more likely to choose it. Conversely, if a choice costs us more, we are less likely to choose it. This basic belief of economics is a powerful tool because we can apply it widely. Incentives affect behaviour in almost all aspects of our lives, ranging from what we buy, what we decide to do at home, how we choose our governments. When we buy things, the basic economic belief is that, if the price of something increases, consumers will buy less of it; producers, on the other hand, will supply more of it since the price increase makes it more profitable for them to produce the good. Both buyers and sellers respond to incentives. Market prices will bring their actions into a balance. If the amount which people want to buy is more than the amount sellers are willing to provide, the price will rise. The higher price will discourage consumption and encourage more production of the good or service. This will bring the amount demanded and the amount supplied into balance. Alternatively, if consumers do not wish to buy the current output of a good, stocks will accumulate and there will be downward pressure on the price. In turn, the lower price will encourage consumption and slow down production until the amount demanded by consumers once again balances the production of the good. Markets work because both buyers and sellers alter their behaviour according to changes in incentives. Of course, this process does not work immediately. It will take time for buyers to respond fully to a change in price. In the same way, it will take time for producers to produce more in response to a price increase or to reduce production if price de-clines. Still, the effect is clear—market prices will coordinate the actions of both buyers and sellers and will bring them into harmony. The response of buyers and sellers to the higher petrol prices of the 1970s in America illustrated the importance of incentives. As petrol prices rose, consumers cut down on less necessary trips and tried to travel together in cars. Gradually, they changed to smaller, more fuel-efficient cars in order to reduce the amount of petrol they used. At the same time, petrol suppliers increased their drilling to find new wells, they used a water flooding technique to get more oil from existing wells, and they also looked more intensely for new oil fields. By the early 1980s, this combination of factors put downward pressure on the price of crude oil. Incentives also influence political choices. The person who shops in a market is the same person who shops among political alternatives. In most cases, voters are more likely to support political