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The activity theory suggests that the more involved adolescents stay in hobbies until they turn into adults, the more likely they are to be happy.
Opportunity Cost
The cost of forgoing the next best alternative when making a decision or investment.
Economic Profits
Profits exceeding the opportunity costs of all resources employed, reflecting a return beyond the normal profit level.
Economic Costs
The total value of all the resources used in the production of goods or services, including both explicit and implicit costs.
Economic Profit
The difference between total monetary revenue and the total costs of inputs (including opportunity costs), representing the financial gain exceeding the economic opportunity lost.
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