1/28 Eco Study Notes on Economic Models and Principles

Introduction to Economic Models

  • Throughout this course, the focus will be on economic models and their functioning.
  • Due to time constraints with the previous class, some content may be skipped but could be revisited later in the semester.

Principles of Economics

Basic Categories of Economic Principles

  • The principles will be classified into three categories:
    1. How individuals make choices.
    2. The interaction of individuals with one another.
    3. Broader thoughts on efficiency.

The Economic Way of Thinking

  • Answers to understanding the economic way of thinking include:
    • Making the most of what you have (efficient use of resources).
    • Evaluating the opportunity cost of every decision (cost of the next best alternative).
    • Thinking at the margin (marginal gains versus marginal losses).

Key Concepts

Trade-offs
  • Definition: Individuals face trade-offs due to unlimited wants and scarce resources.
  • Implication: We cannot have everything; choices must be made to optimize limited resources.
Opportunity Cost
  • Definition: The opportunity cost is what is sacrificed when making a decision—specifically, the next best alternative.
  • Examples:
    • Free Lunch Concept: "There's no such thing as a free lunch." Even if a lunch appears free, there are hidden costs (e.g., time, effort).
    • Example: Attending a program for free pizza requires time that could have been spent doing other activities.
  • Consideration: Costs are not always monetary; the term encompasses all types of sacrifices involved in a decision.
Thinking at the Margin
  • Definition: Marginal analysis involves weighing the additional benefits of an action against its additional costs.
  • Examples of marginal decisions include:
    • Whether to attend an entire class or just part.
    • Deciding on additional college credits or courses.
  • Example provided about tuition costs at UWL, where taking more classes beyond a threshold incurs no additional fee; decisions impact incentives and time management.

Decision-Making and Policy Implications

Marginal Analysis in Practice

  • Everyday decisions involve making marginal comparisons:
    • Coffee consumption example: balancing the cost against the benefit of consuming additional cups.
    • Ethical implications of policy designs based on marginal thinking.

Real-World Applications

Three Strikes Laws
  • Originated in California during the early 90s, aiming to reduce crime via increased penalties for repeat offenders.
  • Empirical Effects: Deterred recidivism but led to unintended increases in violent offenses (e.g., murder).
  • Rationale: Increased penalties for the third felony diminished the cost of additional violent acts, creating the wrong incentives.

Incentives in Economics

Importance of Incentives

  • Individuals act based on rational self-interest and potential benefits.
  • Example: The Tooth Fairy comic illustrates how increased incentives can lead to adverse behaviors (e.g., tooth farming).
  • COBRA Effect: A historical example where a bounty program to eliminate cobras in India resulted in cobra breeding farms, thus increasing the population instead of reducing it.

Policy and Market Efficiency

  • Government involvement is justified when free markets lead to inefficient outcomes (e.g., environmental issues, monopolies).
  • Efficiency should be aimed for in public policies (progressive taxation, social and environmental programs).

Economic Models

Purpose of Economic Models

  • Economic models are simplifications of reality, used to derive insights and predict behaviors by isolating key variables and holding others constant (ceteris paribus).
  • Production Possibilities Frontier (PPF): A standard model illustrating trade-offs and opportunity costs between two goods.
Key Features of the PPF
  • Points on the frontier represent efficient resource allocation.
  • Points inside the frontier indicate inefficiency (waste of resources).
  • Points outside the frontier are unattainable with current resources.
Dynamics of the PPF
  • Shifted productive capabilities increase opportunity costs for one good as resources become specialized.
  • Example of constant opportunity costs illustrated with linear slopes.
  • Changes in productivity affect cost curves directly, impacting decision-making as demonstrated through various examples of resource allocation.

Comparative Advantage

  • Understanding comparative advantage emphasizes low opportunity costs dictates specialization for efficiency in economies.
  • Example demonstrated with LeBron James and a hypothetical lawn mowing scenario indicating comparative vs. absolute advantage.

Conclusion on Economic Models and Principles

  • Thoughtful inquiry into opportunity costs and marginal benefits underscores the intricacies and rationality of individual choices within economic frameworks.
  • The course will employ these models and principles to assess real-world policies and their effects on economic behavior.