Zoë's Utility Function for Altruistic Choice

An individual must decide how to allocate a fixed sum of money between themself and another person. The accompanying graph illustrates this choice. The straight diagonal line represents all possible allocations (the feasible frontier). The curved lines are the individual's indifference curves, where curves further from the origin represent higher levels of personal satisfaction. Which point represents the individual's optimal allocation, and why?

Analyzing an Altruistic Decision

Analysis of a Suboptimal Altruistic Choice

Consider a graphical model where an individual is deciding how to allocate a fixed sum of money between themself and another person. The straight line represents all possible allocations, and the curved lines represent the individual's levels of satisfaction (with curves further from the origin indicating higher satisfaction). If a specific allocation point lies on the straight line but is intersected by a satisfaction curve (rather than being just tangent to it), this point represents the best possible choice for the individual.

Interpreting Preferences in an Altruistic Choice Model

In a graphical model representing an individual's decision on how to allocate a fixed sum of money between themself and another person, match each graphical component to its correct interpretation.

In a graphical model of altruistic choice, the optimal allocation of a fixed sum of money between oneself and another person occurs at the point of tangency between the feasible frontier and an indifference curve. At this specific point, the individual's marginal rate of substitution (the rate at which they are willing to trade their own money for the other person's) is exactly ______ to the marginal rate of transformation (the rate at which they can trade their own money for the other person's).

You are tasked with creating a graphical model to determine the optimal way for an individual to allocate a fixed sum of money between themself and another person, based on their personal preferences. Arrange the following steps in the correct logical order to construct this model and find the solution.

The provided graph illustrates how an individual decides to split a £200 windfall between themself (horizontal axis) and a friend (vertical axis). The straight diagonal line shows all possible allocations. The curved lines represent the individual's satisfaction levels, with curves further from the origin representing higher satisfaction. Initially, the individual's optimal choice is at Point A (£140 for themself, £60 for their friend). Suppose the individual's attitude changes, and they become substantially more altruistic, valuing their friend's gain more than they did before. Which of the following points is the most plausible new optimal choice?

Impact of a Matching Grant on Altruistic Choice

Figure 4.10 (Left Panel) - Visualizing Zoë's Altruistic Preferences

Optimal Choice as Utility Maximization under Constraints

Principle of Constrained Utility Maximization