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When it is impossible to carry out a controlled experiment, economists often turn to a:
Q4: By definition, inalienable rights:<br>A) belong to individuals,
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Q21: Science is justified through heuristic models.
Q50: An economist observes that a pharmaceutical company
Q51: Poverty is defined by the U.S. government
Q60: A liberal economist would never recommend that
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Q85: When the top marginal tax rate fell