Comprehensive Study Notes on Chapter 11: Public Goods, Common Resources, and Market Failures

Semester Logistics and Upcoming Schedule

  • Course Progression: The semester is entering its final segment with specific allocations for the remaining chapters:     - Chapter 11: Concluding today.     - Chapter 14: Will be covered over the next three class sessions.     - Chapter 15: Planned for two class sessions.     - Chapter 16: A brief overview in one class session to tie the semester themes together.
  • Final Exam Details:     - Date and Time: Tuesday, May 5, from $10:30$ AM to $12:00$ PM.     - Location: Conducted in the regular classroom with existing seating charts.     - Comprehensive Format: The exam includes $20$ questions repeated verbatim from previous assessments:         - $10$ questions from the first exam (word-for-word).         - $10$ questions from the second exam (word-for-word).     - New Material: Questions covering chapters since the last exam will be newly created for the final.
  • Assignments and Deadlines:     - Chapter 11 Homework: Due next Monday.     - Concept Check 20: Due by the end of the current day.
  • Exam 2 Returns:     - Exams will be returned in class on Thursday at $01:45$ PM.     - Scores and bonus point totals will be disclosed at that time.     - Participation Requirement: Students must be present to receive bonus credit, unless they have a university-excused absence.

Concept Check 27: The Patel wall of Econ

  • Purpose: An optional assignment designed to help students catch up on missing concept checks and boost grades.
  • Submission Options: Students may submit an "econ art" piece, a poem, or an original short video/TikTok.
  • Grading: Submissions are graded on a scale of 7/57/5 points ($5/5$ plus $2$ bonus points).
  • Originality: Content must be the student's own creation, not shared content from others.
  • Patel's Copyright: The professor shared a personal example: "Roses are red, violets are blue, econ sucks, so do you." This is noted as "Patel infringed copyright" to remind students not to copy it.
  • Patel's Wall of Econ: Exceptional student artwork is displayed on a physical wall in the professor's office.

Classifying Goods and Services: Four Technical Definitions

  • Rivalry in Consumption: Occurs when one person's consumption of a good diminishes the use of that good for someone else. This applies to scarce resources or items with limited capacity.     - Examples: Software with a limited number of licenses; tickets to a football game, cinema, or sporting event where fixed seating means one purchase reduces availability for others.
  • Non-rivalry: One person's consumption does not exclude others from using the good, nor does it diminish its quality or availability for others. This often involves goods that are not scarce.     - Examples: Internet search engines (Yahoo, Bing, Google); online videos.
  • Excludability: A situation where a person can be completely prevented from consuming a good or service. This is typically achieved through pricing (if they don't pay, they can't use it) or private property rights.
  • Non-excludability: A situation where a person cannot be prevented from consuming a good or service, regardless of whether they paid for it.

The Four Quadrants of Goods

  • Private Goods: These are both Excludable and Rival.     - Example: An ice cream cone. Once purchased, you exclude others from it, and your consumption leaves less for others.
  • Club Goods: These are Excludable but Non-rival.     - Example: A cinema or subscription software. You must pay to enter (excludable), but one viewer doesn't necessarily diminish the experience for others until capacity is reached.
  • Common Resources: These are Non-excludable but Rival.     - Example: The environment (pollution) or fish in the ocean. You can't easily stop people from using them, but consumption/pollution by one party diminishes the resource for others.
  • Public Goods: These are both Non-excludable and Non-rival.     - Example: Tornado sirens or national defense. If one person hears the siren, others can too without diminishing the sound, and you cannot stop non-payers from hearing it.

Market Failure and the Free Rider Problem

  • The Free Rider Problem: This occurs when individuals benefit from a good or service without paying for it. This problem is inherently linked to non-excludable goods.
  • Consequences: Because private firms cannot exclude non-payers, they cannot capture the full value of the service, leading to a situation where the private market under-provides the good.
  • The Role of Government: To solve this market failure, the government must step in to provide public goods, funding them through taxation to ensure everyone who benefits contributes.
  • Examples of Free Riding:     - Defense: Elon Musk does not pay for the U.S. defense personally because even if he did, everyone else would benefit for free (free riding).     - Education/Voting: Relying on others to vote for a preferred candidate while staying home.     - Street Performers: Watching a performance without contributing to the tip bucket.     - Digital Media: Illegal downloads or sharing streaming passwords for services like Netflix, Prime Video, Hulu, and HBO.

Cost-Benefit Analysis

  • Definition: A process used by governments to decide whether to provide a public good by comparing the total social benefits to the total costs.
  • Decision Metric: If Benefit>Cost\text{Benefit} > \text{Cost}, the project should proceed. If Cost>Benefit\text{Cost} > \text{Benefit}, it should not.
  • Economic Exercise (Safety Light):     - Scenario: Installing a traffic light costs $50,000\$50,000. It has a 0.5%0.5\% chance of saving a life valued at $5,000,000\$5,000,000.     - Calculation: Expected Benefit=0.005×5,000,000=$25,000\text{Expected Benefit} = 0.005 \times 5,000,000 = \$25,000.     - Conclusion: Since $25,000<$50,000\$25,000 < \$50,000, the cost-benefit analysis suggests the light should not be installed based on a single life saved.

Tragedy of the Commons and Resource Management

  • The Tragedy of the Commons: A situation where individuals act in their own interest to over-consume a common resource, leading to its depletion.     - Metaphor: "Peeing in the pool." If one person does it, it's negligible; if everyone does it, the resource is ruined.     - Examples: Overfishing, deforestation, and congested roads.
  • The Elephant Population Case Study:     - Elephant populations are declining due to poaching for ivory, driven by information asymmetry regarding medicinal powers.     - Illegalization Paradox: Making ivory illegal increases its price and value, providing higher incentives for poor locals to poach.     - Private Property Rights Solution: Comparing elephants to cows. Because cows are private property, owners have incentives to conserve and grow the population for revenue.     - Regional Policy Differences:         - Kenya: Hunting is illegal, but the population has struggled. Note: The David Sheldon sanctuary rescues baby elephants fed with milk bottles.         - Zimbabwe/Botswana: Legalized, regulated hunting allows killing senior animals for a fee (e.g., $25,000\$25,000). This works only if the money is distributed to the local public to remove poaching incentives.
  • The Northern White Rhino: A tragic example of conservation failure. The last male died a few years ago; only two females (mother and daughter) remain.

Questions & Discussion

  • Clicker Question 1: Why wouldn't Elon Musk pay for USA defense alone?     - Audience Responses: "Cost too much," "Not his problem," "Not a patriot," "US defense is a public good," "Target for enemy countries."     - Instructor Summary: It is because of the free-rider problem. Musk cannot exclude non-payers from the safety provided by national defense.
  • Clicker Question 2: Why do governments collect taxes for public goods?     - Correct Answer: Because of the non-excludable nature of public goods (Answer A).
  • Clicker Question 3: Elephant population thriving in legal vs. illegal hunting zones.     - Initial Response: 80%80\% True, 20%20\% False.     - Final Discussion Result: Flipped to False. Property rights and regulated hunting fees often provide better conservation incentives than total bans that drive up black market prices.
  • Social Media Discussion: The overuse of social media is framed as a common resource problem. Discussion of whether the U.S. should follow countries like Australia, Denmark, Sweden, and Norway in banning social media for those under $16$.