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A two-year-old child is eating raisins one at a time from a large box. Even though the child doesn't understand formal economic theory, he knows when to stop eating because he is full. Describe how this child has already mastered marginal analysis.
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Each characteristic or quality of a particular entity.
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A specific thing or being, especially one that is distinct among other similar entities.
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Class Table: PID
A data table in a database or information system that organizes information based on a primary identification key, often found in object-oriented programming and database management.
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