Dependence of Game Equilibrium on Players' Altruism
In games involving social preferences like altruism, the resulting equilibrium is contingent upon the specific degree of altruism held by each participant. This means that different combinations of player preferences can lead to different game outcomes.
0
1
Tags
Library Science
Economics
Economy
Introduction to Microeconomics Course
Social Science
Empirical Science
Science
CORE Econ
Ch.4 Strategic interactions and social dilemmas - The Economy 2.0 Microeconomics @ CORE Econ
The Economy 2.0 Microeconomics @ CORE Econ
Learn After
Equilibrium with Mutual Altruism in the Pest Control Game
Equilibrium with an Altruistic Anil and a Self-Interested Bala
Strategic Decisions with Social Preferences
Consider a two-player game with the following material payoffs, where the first number in each pair is the payoff for Player A and the second is for Player B:
Player B: Strategy X Player B: Strategy Y Player A: Strategy X (3, 3) (1, 4) Player A: Strategy Y (4, 1) (2, 2) Assume Player A is entirely self-interested and seeks only to maximize their own material payoff. Player B, however, is altruistic and makes decisions to maximize the sum of both players' payoffs. Given these preferences, what is the most likely outcome of the game?
The Impact of Altruism on Strategic Outcomes
Two individuals, Player 1 and Player 2, must independently decide whether to make a 'Cooperative' choice or a 'Self-Interested' choice. A Cooperative choice benefits the other player at a small cost to oneself, while a Self-Interested choice benefits oneself at a larger cost to the other player. The final outcome depends on the combination of their personal preferences (how much they care about the other's payoff). Match each description of the players' preferences to the most likely strategic outcome.
In a two-player game where each player's payoff depends on the choices of both, a shift in Player A's preferences from pure self-interest to altruism will not change the optimal strategy for a purely self-interested Player B.
Analyzing Strategic Shifts Due to Altruism
Consider a scenario with two players, Alex and Ben, who must each choose between two actions: 'Cooperate' or 'Defect'. The material payoffs for each player depend on the combination of actions chosen. Alex is known to be purely self-interested, always choosing the action that maximizes their own material payoff. Ben is altruistic, meaning they care about both their own payoff and Alex's payoff.
Under what circumstances will Ben choose to 'Cooperate' even if 'Defect' would yield a higher personal material payoff for Ben?
Calculating the Altruism Threshold
Altering Strategic Outcomes
Two business partners, Sarah and Tom, must independently decide whether to pursue a 'High-Risk' or 'Low-Risk' venture. The table below shows the potential profits (in thousands of dollars) for each partner based on their combined choices. The first number in each cell is Sarah's profit, and the second is Tom's.
Tom: High-Risk Tom: Low-Risk Sarah: High-Risk (10, 10) (0, 12) Sarah: Low-Risk (12, 0) (5, 5) Initially, both partners are purely self-interested, aiming only to maximize their own individual profit. An analyst makes the following claim: 'If Sarah's preferences change so that she becomes altruistic (meaning she now also values Tom's profit in addition to her own), the final strategic outcome of their decision will not change.'
Evaluate the analyst's claim.
Degree of Altruism Determines Strategic Choice via Indifference Curve Shape