Introduction to Economic Thinking and the Economic Perspective

Define Economics and the Economic Perspective (CO 1):
- Provide a comprehensive definition of economics.
- Explain the primary features of the economic perspective, specifically:
  - The assumption that people are rational.
  - The fact that people respond to economic incentives.
  - The principle that decisions are based on marginal analysis.
Key Terminology:
- Define and differentiate between the terms: economics, scarcity, trade-offs, and opportunity costs.
Theory of Rational Behavior:
- Explain how the theory of rational behavior accounts for individuals’ responses to economic incentives.
Concept of 'Marginal':
- Explain the economic usage of the term 'marginal' and provide a concrete example of marginal analysis in practice.

Economics as a Social Science:
- Economics is defined as a social science specifically concerned with making optimal choices under conditions of scarcity.
- It is the study of how individuals, firms, and whole societies seek to satisfy unlimited wants using limited (scarce) resources.
The Concept of Scarcity:
- Scarcity refers to the fundamental economic dilemma where human and societal wants will always exceed a society's actual ability to produce.
- The availability of economic resources necessary to satisfy current wants and needs is inherently and always limited.

Assumptions of Rationality:
- The economic perspective assumes that individuals and institutions make rational decisions when faced with scarcity.
Scarcity and Choice (The Core Conflict):
- Because resources are scarce, choices must be made.
- Every choice entails an opportunity cost—the reality that something attainable was given up in favor of something deemed more desirable.
Guides to Rational Decision-Making:
- Individuals and institutions are guided by two main factors:
  1. Availability of Incentives: Used to increase utility.
  2. Marginal Analysis: The practice of comparing the costs and benefits of the very next course of action.

Scarce Economic Resources:
- Resources used in the production of goods and services are limited.
- Consequently, choices regarding the allocation and use of these resources are mandatory.
Opportunity Cost (The "No Free Lunch" Principle):
- Every choice has an opportunity cost.
- The use of a resource for one specific purpose automatically means that resource cannot be utilized to create something else.
- Economic theory posits "There is no free lunch," meaning that even if something appears free, the resources used to provide it have been diverted from another potential use.

Maximizing Utility:
- In the process of making economic decisions, individuals strive to maximize satisfaction, referred to in economics as "utility."
- Simultaneously, they aim to minimize dissatisfaction.
The Role of Incentives:
- Incentives provide the mechanism for increasing utility. Individuals and businesses make rational decisions to improve their economic well-being or self-interest.
Case Study: DNA Sampling and Criminal Reform:
- In many states, convicted felons must submit DNA samples to a database.
- This database allows DNA from new crimes to be checked against existing records, making repeat offenders more likely to be apprehended.
- Result: The introduction of this process reduced repeat convictions by serious violent offenders by $17\%$ .
- Economic Conclusion: Even criminals respond rationally to economic incentives (in this case, the increased risk and cost of being caught).
Maximizing Profit in Firms:
- Firms seek to maximize profit and minimize loss.
- Case Study: Walmart Pricing: Walmart does not select prices at random. It chooses prices it believes will be most profitable.
- Often, these prices are lower than those of competitors because lower prices increase the quantity demanded, while higher prices reduce it.
Clarification on Self-Interest:
- Economists distinguish between "rational self-interest" and "selfishness"; the two are not the same.

Definition of Marginal:
- In an economic context, "marginal" refers to "extra" or "additional."
The Decision Rule:
- Marginal analysis involves comparing marginal benefits ( $MB$ ) and marginal costs ( $MC$ ).
- A decision is made to proceed with an action if and only if the marginal benefit is equal to or greater than the marginal cost ( $MB \ge MC$ ).
Incremental Nature of Decisions:
- While some decisions are "all-or-nothing," the majority of economic decisions involve doing a little more or a little less of a specific activity.
Example: Studying vs. Television:
- Scenario: Choosing whether to watch an extra hour of TV instead of studying for an exam.
- Marginal Cost ( $MC$ ): The potential for a poorer grade on the exam.
- Marginal Benefit ( $MB$ ): The enjoyment derived from an extra hour of a favorite series.

The Risk of Policy Changes:
- Government policies can alter economic incentives in ways that lead to unintended consequences.
The Federal Student Loan Program (August $2022$ ):
- President Biden announced a plan to assist student loan borrowers, which included reducing annual payments for most borrowers from $10\%$ of their income down to $5\%$ .
Economic Implications:
- Under these revised repayment rules, a typical college student may only end up repaying approximately $50\%$ of the total amount borrowed.
- Unintended Consequence Question: If students know there is a high probability they will never have to repay a large portion of the loan, will they borrow extra money for "living expenses"?
- Market Impact: This shift in incentive could potentially encourage colleges to increase tuition, as students become less sensitive to the total cost of borrowing.