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What Is the Focus of the Field of Epidemiology? How

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What is the focus of the field of epidemiology? How do the concepts of prevalence and incidence relate to this field?


Definitions:

Law of Diminishing Marginal Utility

states that as a person consumes more of a good or service, the utility (satisfaction) gained from each additional unit decreases.

Principal-agent Problem

A dilemma occurring when one person or entity (the agent), is able to make decisions on behalf of, or that impact, another person or entity: the principal.

Complementary Resource

A good or service that enhances the use or value of another good or service when the two are used together.

Productivity

A measure of the efficiency of production, often expressed as the ratio of outputs to inputs in a given timeframe.

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