2.1 Macro - GDP and Economic performance
Introduction to Macroeconomics
Focuses on the economy as a whole, rather than individual markets or economic agents. It examines broad economic phenomena such as national output, employment, inflation, and economic growth.
Considers overall business services, labor markets, and the aggregate economic performance of the entire country, including interactions between sectors like households, firms, government, and the international sector.
Unit Two: Measuring Economic Performance
The last major unit for the semester, typically spanning about four to five days of classes, providing a comprehensive understanding of macroeconomic metrics.
After this unit, a significant project will be assigned, requiring application of the concepts learned.
Sets the fundamental context for understanding how the macro economy operates, how its health is assessed, and what factors drive its performance.
Economic Performance Measurement
Emphasizes the critical importance of systematically assessing the economy's current state to inform policy decisions and understand societal well-being.
Acknowledges that the methodologies and sophistication of economic condition assessments have significantly evolved over time, reflecting advances in economic theory and data collection.
Historical context: Before the Great Depression of the 1930s, economic assessments were primitive, primarily relying on anecdotal evidence or limited data focused on business performance. This often led to a lagging recognition of severe economic downturns like recessions and depressions, making timely policy responses difficult.
The formal business cycle model and the systematic collection of national income accounts (like GDP) were largely developed post-Great Depression in an effort to better understand and manage economic fluctuations.
Topic 2-1: Business Cycles and GDP
The economy's characteristic fluctuations are often visually represented as a "roller coaster," illustrating periods of growth followed by contraction.
Business Cycle: Refers to the short-run, recurrent fluctuations in economic activity around a long-term growth trend. It describes the economy's movement through various phases:
Expansion: A period where the economy is growing, characterized by increasing real GDP, rising employment, and often higher inflation. This upward slope signifies improving economic performance.
Associated with overall business prosperity, increased consumer and business confidence, and higher investment.
Employment increases as firms hire more workers to meet rising demand.
Rising GDP (Gross Domestic Product) as the total value of goods and services produced expands.
Peak: The highest point of the business cycle, signifying the maximum level of economic performance and the end of an expansionary phase. At this point, growth typically slows, and inflationary pressures might be high.
Recession: A period where the economy is contracting, defined classically as at least two consecutive quarters of declining real GDP. This downward slope indicates a significant decline in economic activity.
Associated with rising unemployment, falling GDP, decreased consumer spending, and reduced business investment.
Businesses may reduce production, lay off workers, and profits may decline.
Trough: The lowest point in the business cycle, marking the end of a recession and the beginning of a new expansion. At this stage, unemployment is usually at its highest, and output is at its lowest.
Identification of Business Cycle Phases
Discussion on various quantitative and qualitative indicators for determining the current phase of the business cycle, as definitive identification often only occurs retrospectively.
Economic Indicators: Statistics that reveal the current state and future direction of the economy, serving as a comprehensive measure of economic health.
Gross Domestic Product (GDP): Calculation Methods
GDP measures the total monetary or market value of all the finished goods and services produced within a country's borders in a specific time period. There are three primary methods for calculating GDP, all of which should ideally yield the same result:
Expenditure Approach: Sums up all spending on final goods and services in an economy. This is the most commonly used method.
Formula:
C (Consumption): Spending by households on goods and services (e.g., food, housing, healthcare).
I (Investment): Spending by businesses on capital goods (e.g., factories, equipment), residential construction, and changes in inventories.
G (Government Spending): Spending by the government on goods and services (e.g., infrastructure, defense, public employee salaries). This excludes transfer payments.
(X - M) (Net Exports): Total exports (X) minus total imports (M). Exports are goods and services produced domestically and sold abroad, while imports are goods and services produced abroad and sold domestically.
Income Approach: Sums up all the income earned by households and firms in the economy. This represents the total factor income generated from production.
Components include: Wages, salaries, and supplementary labor income; corporate profits; interest income; proprietor's income (income of self-employed individuals); rental income; net foreign factor income; and indirect business taxes (e.g., sales tax, property tax) and depreciation allowances.
Production (or Value-Added) Approach: Sums up the market value of all final goods and services produced within a country by summing up the value added at each stage of production. This avoids double-counting.
Value Added: The difference between the value of goods and services produced and the cost of the intermediate goods and services used in their production.
For example, if a lumber company sells wood to a furniture maker for 1200, the value added by the furniture maker is 1200 - $$500). The total value added across all stages reflects the final market value.
What is Excluded from GDP Calculations?
To accurately measure new production and avoid misrepresentation, several types of transactions are intentionally excluded from GDP:
Intermediate Goods and Services: Goods and services used as inputs in the production of other goods and services (e.g., steel used to make a car). These are excluded to prevent double-counting, as their value is already embodied in the final product.
Non-market Transactions: Goods and services produced but not sold in formal markets.
Household Production: unpaid work done in the home (e.g., cooking, cleaning, childcare). While valuable, it's not exchanged for money.
Illegal Activities/Underground Economy: Black market transactions, drug sales, and undeclared cash jobs are not recorded and thus not included.
Transfer Payments: Payments made by the government for which no goods or services are received in return (e.g., social security benefits, unemployment benefits, welfare payments). These are merely transfers of existing income, not payment for new production.
Financial Transactions: The buying and selling of stocks, bonds, and other financial instruments.
These transactions represent transfers of ownership of existing assets, not the production of new goods or services.
Used Goods (Second-Hand Sales): The sale of goods produced in a previous period (e.g., a used car, a house not newly built). The value of these goods was already counted in the GDP of the year they were originally produced.