In his speech, Hu said food security, infrastructure, and tariff-free and quota-free treatment to least-developed countries have been the focus of the G20 consultations on development this year.

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Third, Brazil wants to limit tariff-free imports by a quota similar to the one imposed on car trade in Mercosur in response to surges in imports.

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In economic effect, a trade quota is rather like a tariff coupled with a donation of the tariff proceeds to a wealthy and politically connected foreigner.

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In the same vein, China likely will not retaliate against the U.S. by levying a tariff on U.S. imports or imposing a quota against them.

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