Measuring National Income (National Income Accounting)

Introduction to National Income Accounting

National income accounting provides a systematic framework for measuring the economic activity of a country. The most widely used indicator is the Gross Domestic Product (GDP), which represents the total dollar value of all goods and services produced within a country over a specific period, typically one year.

• GDP is a key indicator of economic wellbeing and is used for comparing economic conditions over time and across nations.

• It informs economic policy by providing insights into the structure of the economy and income distribution.

Methods for Measuring GDP

The Expenditures Approach

The expenditures approach calculates GDP by summing all expenditures made on final goods and services produced within a country during a year. The formula is:

• C (Personal Consumption Expenditures): Includes durable goods (e.g., cars, electronics), non-durable goods (e.g., food), and services (e.g., healthcare, insurance). Purchases by non-profit organizations serving households are included.

• Ia (Gross Investment Expenditures): Final purchases of capital goods, construction (including new houses), and changes in inventories. Changes in inventories adjust for discrepancies between production and sales.

• G (Government Expenditures): Spending on finished products, civil service wages, and national defense.

• X (Exports): Goods and services produced domestically and sold abroad.

• IM (Imports): Goods and services purchased from other countries. Subtracted to avoid counting foreign production.

Net Exports (NX):

Adjusting for Inventory Changes

• If businesses produce more than they sell, the unsold output is counted as an increase in inventories (investment).

• If businesses sell more than they produce, the reduction in inventories is subtracted from investment.

• Thus, Actual Expenditures (AEa) always equal GDP.

Rules for Counting Expenditures

• Avoid double counting: Exclude second-hand goods and intermediate goods (inputs for further production).

• Value Added: To avoid double counting, only final goods are counted, or value added at each stage is summed.

Note: Total value added equals the final retail price ($350).

• Exclude transfer payments: Government transfers (e.g., pensions), private gifts, and financial investments are not included in GDP as they do not reflect current production.

• Exports: All exports are counted as final purchases by foreigners.

• Domestic production: GDP includes all production within a country's borders, regardless of ownership.

Example: Canada's GDP by Expenditures, 2020

The Income Approach

The income approach sums all incomes earned by factors of production in the creation of output. With the adoption of the new International System of National Accounts, Statistics Canada categorizes income as follows:

• Compensation of Employees: Wages, salaries, and employers' social contributions (e.g., EI, pensions, insurance).

• Net Corporate Operating Surplus before Taxes: Income accruing to corporations before interest, rent, and taxes. Includes government enterprises and non-profits.

• Net Mixed Income: Net operating income of unincorporated businesses (e.g., small businesses), combining labour and capital income.

Summing these gives Net Domestic Product at factor cost (NDPfc).

Adjusting NDPfc to GDP at Market Prices

• Add Depreciation (capital consumption allowance).

• Add Net Indirect Taxes (indirect taxes minus subsidies).

Statistical Discrepancy

Statistics Canada reports GDP as the average of the Expenditures and Income approaches, accounting for minor discrepancies due to data collection methods.

Other National Income Indicators

Gross National Product (GNP)

• GNP measures the value of output produced by a country's residents, regardless of location.

• Formula:

• For Canada (2020): GDP = $2,206,766m; GNP = $2,182,121m

Personal Income (PI)

• All incomes received by households, including transfers (e.g., pensions, EI benefits).

• Excludes incomes earned but not received (e.g., corporate taxes, undistributed profits).

Disposable Income (DI or PDI)

• Income available to households after personal taxes.

• Formula:

• Personal taxes include income and property taxes.

GDP per Capita

• GDP divided by the adult population (15+ years).

• Represents average income per resident but may be misleading in countries with high income inequality.

Limitations of GDP and Related Measures

• Does not measure non-market activities (e.g., volunteer work, household production).

• Does not fully capture improvements in product quality.

• Excludes the underground economy (unreported transactions).

• Does not account for environmental costs, income inequality, or non-monetary aspects of well-being (e.g., health, education, leisure).

Nominal GDP, Real GDP, and the GDP Deflator

Definitions

• Nominal GDP: Output measured at current year prices.

• Real GDP: Output measured at base year prices.

• For the base year, Nominal GDP = Real GDP.

GDP Deflator (GDP Price Index)

• Measures the price level of all goods and services included in GDP.

• Formula:

• For the base year, the GDP Deflator is always 100.

• Real GDP can be calculated as:

Price Indices: GDP Deflator vs Consumer Price Index (CPI)

Comparison of GDP Deflator and CPI

Calculating the CPI

1. Choose a basket of consumer goods.

2. Calculate the cost of the basket at base year prices.

3. Calculate the cost of the basket at current year prices.

4. Divide the current year cost by the base year cost and multiply by 100.

Formula:

Rate of Inflation: GDP Deflator vs CPI (Canada, Selected Years)

Effects of Inflation

• Unanticipated inflation redistributes wealth arbitrarily from savers and lenders to borrowers.

• Anticipated inflation allows economic agents to plan, reducing arbitrary redistributions.

Summary of Key Formulas

Additional info: The notes above expand on the brief points in the original slides, providing definitions, context, and examples for each concept. Tables have been recreated for clarity, and all key formulas are presented in LaTeX format as required for academic study.