Self-Interest in Economic Models
Self-interest is a foundational assumption in many economic models, positing that an individual's utility is determined solely by the goods they personally obtain, such as their own consumption and leisure. A self-interested person prefers outcomes with higher personal utility and makes choices to maximize it, without regard for the effects on others. In game-theoretic models specifically, a player's utility is typically represented by their own payoff.
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Ch.4 Strategic interactions and social dilemmas - The Economy 2.0 Microeconomics @ CORE Econ
The Economy 2.0 Microeconomics @ CORE Econ
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Indifference in Economics
Utility as an Ordinal Measure
Utility Function
Self-Interest in Economic Models
An individual is deciding how to spend their Saturday afternoon. They have evaluated their options and assigned a personal satisfaction rating (on a scale of 1 to 100) to each one. According to the economic concept that individuals make choices to achieve the greatest personal satisfaction, which option will they choose?
Job Choice and Personal Satisfaction
Rational Choice and Personal Satisfaction
According to the economic principle that individuals choose the option providing the most satisfaction, a person who selects a lower-paying but more enjoyable job over a higher-paying but less enjoyable one is acting irrationally.
A consumer has $20 and is deciding what to purchase. They can afford Bundle A (2 apples, 1 orange) for $15, Bundle B (1 apple, 3 oranges) for $18, or Bundle C (3 apples, 2 oranges) for $20. After careful consideration, the consumer chooses to purchase Bundle B. Assuming the consumer's goal is to achieve the greatest personal satisfaction, what is the most logical conclusion from this decision?
Subjectivity in Economic Choices
A student has a free afternoon and is considering three activities: reading a book, going for a run, or watching a movie. All three options are equally available and have no associated monetary cost. The student chooses to go for a run. Based on the economic concept of maximizing personal satisfaction, what is the most accurate conclusion that can be drawn from this decision?
Predicting Choice Based on Satisfaction
An economic model assumes that when individuals choose among available options, they select the one that provides the most personal satisfaction. Which of the following scenarios presents a choice that is LEAST consistent with this principle?
Two friends are at a cafe and both have enough money to buy either a cup of coffee or a cup of tea, which are sold for the exact same price. One friend chooses the coffee, while the other chooses the tea. Based on the economic concept of how individuals make choices to maximize their satisfaction, what is the most logical conclusion?
According to the economic principle that individuals choose the option providing the most satisfaction, a person who selects a lower-paying but more enjoyable job over a higher-paying but less enjoyable one is acting irrationally.
Rational Choice and Personal Satisfaction
Interdisciplinary Applications of Game Theory
Best Response (in Game Theory)
Equilibrium (in a Model)
Setup for the Adam and Bella Entertainment Choice Game
Advancement of Game Theory through Nash's Work
Strategic Interaction
Enhancing Game-Theoretic Models to Account for Cooperative Behavior
Self-Interest in Economic Models
Homo Economicus
Foundational Importance of Game Theory and Nash Equilibrium for Economic Modeling
Definition of Social Dilemma
Definition of Social Interaction
John Nash
Analyze each of the following scenarios. Match each scenario with the type of social outcome that is most likely to result from the self-interested actions of the individuals involved.
Strategic Business Decisions
The Coffee Shop Dilemma
Analyzing US Financial Fragility
Two competing coffee shops, 'The Daily Grind' and 'Espresso Yourself', are located across the street from each other. Each must independently decide whether to lower their prices. The table below shows the daily profit each shop can expect based on their combined decisions. The first number in each cell is the profit for The Daily Grind, and the second is for Espresso Yourself.
Espresso Yourself: Keep Price High Espresso Yourself: Lower Price The Daily Grind: Keep Price High $500, $500 $200, $600 The Daily Grind: Lower Price $600, $200 $300, $300 Assuming both shops act in their own immediate self-interest to maximize their own profit, what is the most likely outcome of this situation?
The Farmers' Irrigation Dilemma
A social interaction, where each individual's decisions affect the outcomes of others, will always result in a worse outcome for everyone involved when each person acts solely in their own self-interest.
A small city's transportation market for on-demand rides is dominated by a single taxi company that owns all the operating licenses, resulting in high prices and long wait times for consumers. A new city council wants to introduce policies to make this market more competitive. Arrange the following potential policy changes in order from the one that would MOST increase competition to the one that would LEAST increase competition.
Resolving a Shared Resource Dilemma
Non-Social Interactions in Economic Models
The Anil and Bala Crop Choice Scenario as a Game
An economist is building a formal model to predict the outcome of a wage negotiation between a labor union and a company's management. To effectively model this as a strategic interaction, which of the following elements is LEAST critical to define as a core component of the model's basic structure?
Self-Interest in Economic Models
An individual is deciding between two job offers. Job A offers a salary of $90,000 per year in a high-stress environment with long hours. Job B offers a salary of $70,000 per year in a supportive environment with a good work-life balance. The individual chooses Job B. Assuming this person is making a choice to maximize their own well-being, which statement provides the best explanation for this decision?
Rational Choice and Consumer Preferences
Subjectivity of Preferences
If two individuals, when presented with the exact same set of choices and potential monetary outcomes, make different decisions, at least one of them must have failed to choose the option that provides the highest personal value.
Each scenario below describes a choice an individual makes that prioritizes personal value over the highest possible monetary gain. Match each scenario to the primary non-monetary factor that best explains the individual's decision.
Analyzing Non-Monetary Choices
According to the principles of rational choice, an individual will select the option from a set of feasible choices that is expected to provide the highest level of personal ____.
Inferring Preferences from Choices
A person is faced with several different options for their weekend plans. According to the concept of rational choice, arrange the following steps in the logical order they would follow to select the plan that provides the most personal value.
Analyzing a Business Decision
Predicting Citizen Participation
A technology firm introduced a policy where the employee who stayed latest in the office each day would receive a monthly 'Most Dedicated' award and a cash bonus. Management was surprised to find that after several months, overall project completion rates had declined and team morale was low. Which statement provides the most accurate analysis of this outcome?
Evaluating Public Policy Effectiveness
Evaluating a Behavioral Prediction Model
To accurately predict how people will behave, it is essential to understand their underlying motivations. Match each described behavior with the primary motivation most likely driving it.
A prediction model for charitable donations that only accounts for an individual's income level and tax incentives is likely to be highly accurate because it focuses on the primary rational, self-interested motivations for giving.
Designing Effective Public Policy
Analyzing a Municipal Recycling Program
Evaluating Water Conservation Policies
A municipal government wants to reduce water consumption during a drought. They find that a public awareness campaign emphasizing shared community responsibility and publishing neighborhood-level consumption data is more effective at changing behavior than a policy that only increases the price of water for high-volume users. Which of the following principles most accurately explains this outcome?
Altruism
Inequality Aversion
Individual Preferences as Motivators for Decisions
Self-Interest in Economic Models
Reciprocity
Learn After
Social Preferences
In many economic models, an individual is assumed to be purely self-interested. This means they make choices to maximize their own personal benefit (e.g., money, goods, or leisure) without any consideration for the well-being or outcomes of others. Imagine two people, Person A and Person B, are to receive a shared prize of $1,000. Person A is given the sole authority to decide how the money is split between them, and their decision is final with no future consequences. Based only on the assumption of pure self-interest, what distribution will Person A choose?
Predicting Behavior in a Shared Resource Scenario
According to the economic assumption of pure self-interest, an individual making a decision will always choose the option that results in the worst possible outcome for other people involved.
Analyzing Individual Choice in a Group Project
Match each decision-making motivation with its corresponding description.
Evaluating the Predictive Power of the Self-Interest Assumption
In a strategic interaction modeled by economists, a player who only considers their own final score or payment when making a decision, ignoring any impact on the other players' scores, is acting according to the principle of ____.
In many economic models, individuals are assumed to act based on pure self-interest. This means they make decisions solely to maximize their own personal outcomes (like money or goods) and are indifferent to the effects of their choices on others. Given this assumption, which of the following scenarios describes an action that is inconsistent with pure self-interest?
Evaluating a Business Strategy Decision
A person is presented with two options. Option A gives them $10 and another person $5. Option B gives them $10 and the other person $20. According to the economic assumption of pure self-interest, the person would be indifferent between Option A and Option B.