9/2/25 ECON Norms and Customs in Economic Decisions (no overall title)

Norms and Customs in Economic Decisions

Norms and customs are a subset of culture that shape economic decisions; key examples: cooperation, honesty (trust), and fairness. Society varies in how much of each is present and how severe they are.
These norms influence whether people choose x over y and affect economic outcomes.
Sources of culture include: family (parents), community (coaches, teachers), and peer networks; religious ideas like the Protestant work ethic historically link hard work to perceived divine grace.
Three norms to study: cooperation, honesty and trust, and fairness.

Cooperation
- Occurs in teamwork and joint ventures; incomplete contracts can prompt cooperation to avoid exploitation.
- In experiments, people tend to contribute to public goods and not free-ride excessively.
Trust (and Honesty)
- Becomes more important as market distances grow and transactions are less observable.
- Reputation and honesty reduce asymmetric information (trust signals are important: online reviews, FDA/USDA inspections, etc.).
- Trust has economic payoff: repeat business, lower prices, better terms; there is an optimal level of trust to maximize income.
Fairness
- People care about fair treatment; price gouging laws and minimum wage reflect fairness concerns.
- Fairness can conflict with efficiency: price signals after disasters vs. preventing exploitation.
- Ultimatum and dictator games show fairness considerations in monetary offers beyond pure self-interest.

Family and community transmit norms across generations (parents, coaches, teachers, friends).
The Protestant work ethic links diligent work with moral approval and, historically, with rewards; religious affiliation has declined in some places, but its legacy persists in cultural norms around work.

Individuals with stronger norms in these areas tend to achieve better economic outcomes; economies with more of these norms tend to perform better.
Each norm constrains pure self-interest to some degree, enabling more stable and productive economic activity.

Opposite ends: pure selfishness vs. pure selflessness; neither extreme supports a viable economy.
Real economies operate in between, requiring a mix of self-interest and prosocial behavior for optimal activity.

Traditional view: self-interest drives markets; Smith emphasized that people shouldn’t count on others’ goodness but on their own incentives.
Both extremes are insufficient; a balanced mix of self-interest and cooperation yields better outcomes.
Darwin and evolution: survival can be framed as pursuing self-interest; economists later used this to discuss rationality and cooperation.
In the 1960s–70s, some models assumed rational, self-interested agents; real human behavior often deviates from this simplistic view.

Four-player public goods setup:
- Endowments: 10 per player; if all contribute, pot = 4 imes 10 = 40; doubled to 80; each gets 80/4 = 20 from the pot.
- If one player does not contribute, total contributed = 30; doubled to 60; each gets 60/4 = 15 from the pot.
- Participants still consider their own endowment, so contributions affect total payoff; cooperation raises the pot and individual payoff relative to free-riding.
Other public-goods-like games (e.g., hidden-steal vs. share decisions) show that cooperation emerges even when self-interest would predict defection; reputation and trust matter.

In workplaces, teams are common; even with incomplete contracts, people typically contribute rather than slack off, aiding overall group performance.

As markets grow in complexity, buyer–seller distance increases and trust becomes crucial.
Reputation acts as a signal to reduce asymmetric information (e.g., product quality, medical necessity, financial advice).
Trust yields benefits: repeat customers, lower prices, better access to credit, and higher employee commitment.
International differences exist in trust levels; higher trust generally correlates with better economic performance, but there is an optimal mid-level to avoid exploitation.

Fairness concerns motivate interventions like price gouging laws and minimum wage.
Price gouging laws aim to prevent exploitation after disasters but may reduce price signals that allocate scarce goods efficiently.
Minimum wage policies reflect fairness goals but raise debates about potential efficiency costs; historically, minimum wage policies faced constitutional challenges relating to freedom of contract.

Ultimatum game:
- Player 1 offers a share to Player 2; Player 2 can accept or reject.
- Rational self-interest would suggest accepting any positive offer, or even offering $0; real behavior shows offers commonly around 40$–50, and offers below around 25 are often rejected.
Dictator game:
- Player 1 (the proposer) can give any portion of 100 to Player 2; Player 2 has no choice.
- Even with a self-interested incentive to keep all, people typically give nonzero amounts, demonstrating fairness concerns.

There is an optimal level of trust for maximizing income; too little trust reduces participation and efficiency, too much trust invites exploitation.
A mid-range level of trust correlates with higher income in observed data.

Enhancing trust and reputation mechanisms (e.g., quality signals, reliable institutions) can improve economic performance.
Education, reliable governance, and fair-but-efficient market rules support a healthier balance between self-interest and cooperation.

Pot-and-share math in public goods: ext{endowment} = 4 imes 10 = 40; if all contribute, pot share = 80/4 = 20; if one withholds, pot share = 60/4 = 15.
Trust and distance: greater buyer–seller distance -> higher reliance on reputation.
Optimal trust: neither too little nor too much; moderates income.
Fairness frames: influence willingness to pay or share in economic offers (ultimatum/dictator games).