Macro - GDP

Assessing Economic Performance Methods

  • Reliance on Personal Experience: It is a natural inclination to judge an economy's performance based on one's own personal experience. For example, not finding a job after graduation might lead one to conclude there is a national unemployment problem.

  • Limitations of Personal Experience: Relying on individual experience is shortsighted. One's experience may differ significantly from the overall economy, leading to inaccurate conclusions.

  • Necessity of Broader Metrics: To assess the state of the economy accurately, broader metrics are required. While many important variables exist (e.g., homelessness, income inequality, poverty rates), this discussion will focus on three core economic goals.

Three Basic Economic Goals

1. Gross Domestic Product (GDP)

  • Objective: For GDP to be growing by a satisfying and sustainable amount.

  • Nature of GDP Objective: It is not an absolute monetary target (2121 trillion or 2525 trillion dollars). Its significance lies in its comparative capability.

  • Comparative Significance: GDP becomes a valuable metric when comparing current levels to previous levels. The goal is to see a percentage growth year over year (e.g., 20252025 over 20242024).

  • Satisfying Growth: Growth must be sufficient to create new opportunities and absorb new entrants into the workforce.

  • Sustainable Growth: Rapid, unsustainable growth (e.g., 2020% in a year) is not desirable as it would likely lead to a rapid slowdown in subsequent years. The aim is for a consistent, sustainable rate of growth year after year.

  • Definition of GDP: The dollar value of the final goods and services that were produced through the use of domestic resources.

  • Methods of Calculation (Valuation):

    • Income Approach: Sums all incomes earned by domestic resources within the society, including:

      • Wages

      • Rents

      • Interest

      • Profits

    • Expenditure Approach: Sums the total amount of purchase activity (expenditures) within the society. The spending sectors are:

      • Households (C): Consumption spending.

      • Businesses (I): Investment spending.

      • Government (G): Government spending.

      • International Sector (X_n$): Net exports (Exports minus Imports).

    • Formula: GDP = C + I + G + X_n $$

    • Focus: This course will primarily focus on the expenditure approach.

Consumption (C)

  • Definition: Spending by the household sector.

  • Income vs. Spending: Household income is not necessarily equal to spending. Income has two potential uses: spending or