import quota

Imagine a nightclub that lets in only 100 people a night, no matter how many line up outside. The cap is not on the ticket price but on the number of bodies allowed through the door. An import quota does the same thing at the border: instead of taxing foreign goods, the government simply limits how many can enter at all. Once the limit is hit, no more get in, however much buyers want them.

An import quota is a legal cap on the physical quantity of a good that may be imported in a given period. By holding imports below what buyers would otherwise purchase, it makes the good scarcer at home, which pushes up its price — just as a tariff does, but through a hard limit rather than a tax. Suppose a country usually imports 1 million tonnes of sugar but sets a quota of 600,000. The shortfall raises the domestic price; local producers sell more at that higher price and gain, while consumers pay more and lose. The big difference from a tariff is where the extra money goes: the gap between the world price and the higher home price becomes 'quota rents', captured by whoever holds the scarce import licences — often foreign exporters or licence-holders — rather than the home government.

Quotas are a blunt instrument and, for the importing country, usually worse than a tariff that restricts trade by the same amount, precisely because the government collects no revenue — that money leaks away as quota rents instead. They also tend to be less transparent and more open to favouritism in handing out the licences. A close cousin is the 'voluntary export restraint', where the exporting country agrees to cap its own shipments to dodge a threatened tariff — famously used on Japanese cars sold to the United States in the 1980s. Like all trade barriers, quotas protect a visible domestic industry at a hidden, larger cost to consumers.