Economic Principle of Self-Interest and Game Theory

Basic Economic Principle Number Three

  • Self-Interest of Economic Decision Makers

    • Economic decision makers act in a self-interested manner.
    • Example: The instructor’s motivation for teaching is largely financial, as they are compensated for their work.

  • Motivation and Behavior

    • People are motivated to act in ways they perceive will benefit themselves.
    • When predicting human behavior in economics, it’s essential to assume that individuals are making decisions based on their own best interests.

  • Impact on Economic Predictions

    • Economists must consider that individuals will not behave according to ideal expectations, but will instead act based on self-interest.

  • Rejection of Self-Interest

    • Many people dislike the idea of being strictly self-interested and prefer to believe they act altruistically.

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Game Theory and the Keep/Share Game

  • Introduction to Game Theory

    • Game theory analyzes strategic decision-making and the behavior of individuals in situations with interdependent outcomes.
    • The example discussed is related to the Keep/Share Game.

  • Payoff Matrix Explanation

    • The matrix shows payouts based on the choices of two participants:
    • Both Share: $1.25 each
    • Both Keep: $0 each
    • One Shares, One Keeps: Keeper gets $250,000, Sharer gets $0.

  • Strategic Dilemma

    • If one participant can see that the other will share, the incentive to keep becomes stronger.
    • This leads to a situation where both participants could end up keeping, resulting in a zero payoff for both.

  • Hypothetical Outcomes

    • Participants feel pressure to act in their own interest, anticipating what the other will do.
    • Predicted Outcome: Economic theory suggests that both players will choose to keep their shares.

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Real-World Application and Observations

  • Television Show Example

    • Despite predictions, actual contestants often choose to share, contradicting economic theory.
    • Emotional factors such as relationships can influence decision-making in ways that traditional economic models may not account for.

  • Analyzing Outcomes Over Time

    • In subsequent seasons, varying outcomes demonstrate the unpredictability of human behavior in relation to economic theories.

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Philosophical Implications of Self-Interest

  • Is Self-Interest Good or Bad?

    • The assessment of self-interest depends on the incentives present in society.
    • Example: A grocery store owner provides food not out of altruism but because they are paid.
    • Key Insight: Self-interest can lead to both positive and negative outcomes.

  • Role of Economists and Government

    • Economists and policymakers are tasked with structuring incentives that channel self-interest towards beneficial societal outcomes.
    • Successful economic systems minimize negative consequences and maximize positive social benefits derived from self-interest.