Article 2
Determination of Dumping
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2.4.2 Subject to the provisions governing fair comparison in paragraph 4, the
existence of margins of dumping during the investigation phase shall normally be
established on the basis of a comparison of a weighted average normal value with a
weighted average of prices of all comparable export transactions or by a comparison of normal value and export prices on a transaction-to-transaction basis. A normal
value established on a weighted average basis may be compared to prices of
individual export transactions if the authorities find a pattern of export prices which
differ significantly among different purchasers, regions or time periods, and if an
explanation is provided as to why such differences cannot be taken into account
appropriately by the use of a weighted average-to-weighted average or transaction-totransaction
comparison.