Results of a Study That Randomly Assigned Mother Infant Dyads

question 208

Multiple Choice

Results of a study that randomly assigned mother infant dyads either to an intervention encouraging breast-feeding or to a control condition without intervention indicated all EXCEPT

• A) it is difficult to encourage mothers to breast-feed.
• B) any relation between breast-feeding and cognitive development can be accounted for by social class.
• C) only infants with a specific allele that regulates fatty acids show benefits from being breast-fed.
• D) there is no well-established nutritional superiority of breast milk.

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Definitions:

Optimal Consumption Bundles

Combinations of goods and services that provide the highest utility to a consumer given his or her preferences and budget constraints.

Sardines

Small, oily fish within the herring family of Clupeidae, often canned and eaten by humans.

Marginal Rate

Often referred to as the marginal rate of substitution or the marginal tax rate, indicating the rate at which one can trade off one good for another or the tax rate on the next dollar earned, respectively.

Substitution

Substitution refers to the economic principle where consumers replace more expensive items with less expensive ones or firms replace inputs with cheaper alternatives, in response to changes in price or availability.