Altruism as a Potential Explanation for High Initial Contributions in the Public Good Game

Cross-Societal Variation in Public Good Game Contributions

In an experiment, groups of four people are each given a new $20 endowment for ten consecutive rounds. In each round, they can secretly contribute any amount of their endowment to a common pool. For every dollar in the pool, each of the four players (including those who didn't contribute) receives $0.40. After each round, all members are informed of how much the other three contributed. Experiments consistently show two patterns: (1) In the first round, average contributions are significantly greater than zero. (2) Across the subsequent nine rounds, the average contribution level steadily falls. Which of the following best analyzes the relationship between these two observed patterns?

Predicting Behavior in a Public Good Game

Analyzing Cooperation Dynamics in a Group Investment Scenario

Describing Contribution Patterns in a Group Project

Statement: In a multi-round experiment where groups of people can privately contribute from an endowment to a shared pool that benefits all members, the typical pattern observed is that contributions start low in the first round and then steadily increase over subsequent rounds as players build trust.

Match each observed pattern from the worldwide public good game with its characteristic description.

In a 10-round experiment, groups of people are repeatedly given an endowment and the opportunity to anonymously contribute to a shared fund that benefits all members, including those who do not contribute. After each round, the total contribution of the group is revealed. Based on typical results from such experiments, arrange the following events by their expected average contribution level, from highest to lowest.

In a multi-round experiment, groups of people can contribute money from a personal endowment to a shared fund. Every dollar contributed benefits all group members, but not contributing while others do yields the highest personal payoff. While initial contributions in the first round are often unexpectedly high, this level of cooperation is typically not sustained. Over subsequent rounds, the average contribution level tends to ____.

Evaluating an Intervention in a Group Investment Scenario

In a 10-round experiment, four-person groups are repeatedly given an endowment to invest in a shared project. For every dollar contributed by any member, all four members (including the contributor) receive a return of $0.40. After each round, the contributions of all members are revealed. Experiments consistently show that contributions are high in the first round but steadily decrease in subsequent rounds. Which of the following statements provides the most robust explanation for this decline in cooperation?

Contribution Pattern in Chengdu's Public Good Game

Contribution Pattern in Chengdu's Public Good Game

Altruism as a Solution to Social Dilemmas

Figure 4.14b: Contributions in Worldwide Public Goods Experiments over 10 Periods