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When an activity like education generates a positive externality, the:
Rate of Return
The gain or loss on an investment over a specified period, expressed as a percentage of the investment's initial cost.
Expenditure
The total amount of money spent by an individual, firm, or government on goods and services.
Innovation
The process of creating new methods, products, or ideas that bring about significant improvements or changes.
Diffusion
The process by which a new idea, product, or practice spreads through a population or society.
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