Dumping
What is Dumping?
Dumping is when a country or firm exports a product at a price below its cost or its home-market price to gain foreign market share.
It can hurt domestic producers in the importing country, which may respond with anti-dumping tariffs. It is often considered an unfair trade practice under WTO rules.
Dumping: a worked example
A foreign steel mill sells hot-rolled coil at home for $600 a ton and exports the identical coil for $420 a ton, while its average total cost is $520 a ton. Both benchmarks are undercut here, since $420 sits below the home price and below cost. Normal value minus export price gives a dumping margin of $600 - $420 = $180 a ton, which is $180 / $420 = 42.9% of the export price. An agency that also finds material injury can impose an anti-dumping duty of $180 a ton, lifting the landed price to $420 + $180 = $600. A domestic mill whose average total cost is $560 a ton was losing money against the $420 import and covers cost once imports land at $600. If imports still ran at 400,000 tons, the duty would collect 400,000 x $180 = $72 million, though the higher landed price pulls that volume down.
The mistake students make with dumping
Students label any unusually cheap import as dumping. An exporter with lower wages, cheaper energy, or newer equipment is exercising comparative advantage, and undercutting the importing country's producers proves nothing on its own. The comparison that matters runs against the exporter's own numbers. A second slip insists the export price must sit below cost. Selling below cost is one route, but the standard benchmark is normal value, meaning the price the exporter charges in its home market. A mill that covers its $520 cost at a $560 export price is still dumping if it charges $600 at home.
Dumping questions
How do you calculate a dumping margin?
A dumping margin subtracts the export price from normal value, which is the price the exporter charges at home or its full cost of production, then divides by the export price. With normal value of $600 a ton and an export price of $420, the margin is $180 divided by $420, or 42.9%. Anti-dumping duties are usually set at or below that margin so the imported good lands at roughly its normal value.
Is dumping good for consumers in the importing country?
Consumers gain at first, because the below-cost price lowers what they pay and expands the quantity they buy. The concern is predatory pricing: if cheap imports push domestic producers out of the market, the exporter faces less competition and can raise prices later. A full answer weighs the short-run gain in consumer surplus against lost producer surplus, lost domestic employment, and the risk of higher prices once rivals exit.
What is the difference between dumping and an export subsidy?
Dumping comes from the exporting firm's own decision to sell abroad below its home price or below cost. An export subsidy is a government payment that lets the firm charge less while still covering its costs. Importing countries answer dumping with anti-dumping duties and subsidies with countervailing duties, and the two are investigated separately even though the harm to domestic producers looks similar in both cases.
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Related terms
Common comparisons
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