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If the correlation between the shyness of a sample of dizygotic twin pairs is .25 and the correlation between the shyness of a sample of monozygotic twin pairs is .50, then the heritability coefficient for shyness is
Merchandise Trade Balance
The difference between a country's exports and imports of tangible goods.
Services Trade Balance
The difference between exports and imports of services of a country, reflecting whether a country is a net provider or consumer of services internationally.
Adam Smith
An 18th-century economist known as the father of modern economics, famous for his theories on free markets and the 'invisible hand'.
International Trade
The exchange of goods and services across international boundaries.
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