G. MacDougal analyzed the export-to-labor productivity ratios between the United States and the United Kingdom to evaluate which economic theory?

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Ricardian theory of comparative advantageHeckscher-Ohlin model of comparative advantageLinder's overlapping demand hypothesisNone of the aboveAll of the above

Explanation

G. MacDougal's comparison of export ratios and labor productivity between the US and UK was conducted to test the Ricardian theory of comparative advantage, which explains trade patterns based on differences in labor productivity.