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The optimal mix of output may not be produced by an economy because of the existence of
Money
A medium of exchange in the form of coins and banknotes; used to facilitate transactions for goods, services, and debts.
Food
Nutritious substances that organisms consume or absorb in order to maintain life and growth.
Water
A transparent, tasteless, odorless, and nearly colorless chemical substance that is the main constituent of Earth's streams, lakes, and oceans.
Positive Reinforcement
A process in which presenting a stimulus following a behavior increases the likelihood of the behavior occurring again.
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