ECN104_econ approach_chpt1_2 (1)

The Economic Approach

  • Course Details:

    • Course Name: ECN 104

    • Semester: Fall 2024

    • Date: September 6, 2024

Outline of The Economic Approach

  • First Principle of Economics: Optimization

  • Second Principle of Economics: Equilibrium

  • Third Principle of Economics: Empiricism

  • Economic Questions and Methods

    • Example: The Return on Investment of University Education

    • Importance of Randomization

What is the Economic Approach?

  • Definitions of Economics:

    • Samuelson and Nordhaus (1995): Economics studies how societies use scarce resources to produce and distribute valuable commodities.

    • Acemoglu et al. (2022): Economics studies how agents allocate scarce resources and the effects of those choices on society.

The Study of Human Behavior

  • Economists primarily study human behavior concerning choices rather than money.

  • Economic Agent:

    • Definition: Any individual or group making choices (e.g., consumers, firms, parents, politicians).

Scarcity in Economics

  • Scarcity Defined: Resources that are desired by individuals where demand exceeds availability.

  • Scarcity illustrates the tension between unlimited wants in a world of limited resources.

Positive vs. Normative Economics

  • Positive Economics:

    • Describes actual behaviors (e.g., some individuals take more chocolates than available).

  • Normative Economics:

    • Recommends how individuals and societies should behave (e.g., each individual should take only one chocolate).

Microeconomics vs. Macroeconomics

  • Microeconomics:

    • Study of choices made by individuals, firms, and governments.

  • Macroeconomics:

    • Study of the economy as a whole.

Key Elements of The Economic Approach

  • The Economic Approach Components:

    1. Stable preferences

    2. Optimization

    3. Market equilibrium

    4. Empiricism

Application of The Economic Approach

  • The economic approach is applicable to both market and non-market behaviors across various domains (e.g., discrimination, marriage, crime).

Principles of Economics

First Principle: Optimization

  • Definition:

    • Making the best choice possible given the information and constraints available.

  • People generally strive to optimize, though they may not always succeed.

Second Principle: Equilibrium

  • Definition:

    • A state where no individual can benefit by changing behavior alone.

Third Principle: Empiricism

  • We utilize the scientific method to observe, hypothesize, and test economic theories using empirical data.

The Role of Opportunity Cost

  • Opportunity costs represent the value of the next best alternative forgone when making a choice.

  • Individuals must consider both benefits and costs, including non-monetary aspects, in their decisions.

Evaluating Economic Outcomes

Importance of Controlling Variables

  • To accurately assess economic outcomes (e.g., education's effect on earnings), we must control for observable and unobservable variables that could bias results.

Randomization in Economic Studies

  • Randomization:

    • Assigning participants randomly to reduce selection bias and isolate the effect of variables being studied (e.g., comparing college graduates' earnings).

Summary of The Economic Approach

  • Collecting data presents challenges, particularly with hidden variables. Experiments can help clarify causal relationships in economic inquiries by establishing controlled conditions.