Overview
This lecture builds on the circular flow of income model by exploring the roles of imports and exports in an open economy, specifically Ireland, and their effects on national income.
Expanding the Circular Flow of Income
- The circular flow of income tracks total expenditure and income in an entire economy, not individuals.
- Households spend income on domestic firms’ goods, and firms pay households for providing factors of production.
- Not all household income is spent; some is saved, and those savings can fund investment through financial institutions.
- Investment increases spending on firms’ output, incentivizing more production.
Role of Imports and Exports
- Ireland is an open economy; households also spend money on imports, not just domestic goods or savings.
- Imports are domestic purchases of foreign-produced goods and services, representing money leaving domestic firms.
- Imports reduce demand for domestic firms’ output and can lower their incentive to produce.
- Exports are foreign purchases of domestically produced goods and services, bringing money into domestic firms.
- Exports increase demand for domestic output, incentivizing firms to produce more.
Impact on National Income
- An increase in imports (with exports unchanged) lowers demand for domestic output, leading to reduced production and national income.
- An increase in exports (with imports unchanged) raises demand for domestic output, leading to increased production and national income.
- National income is a measure of total production in an economy.
Discussion: Should Imports or Exports Be Banned?
- Banning exports reduces firms’ market access and potential profits, lowering national income.
- Banning imports could increase domestic spending but reduces choice, raises costs, and risks retaliation from trade partners.
- Imports can improve living standards by providing goods not efficiently produced domestically.
- Balanced trade is generally preferred, allowing both countries to specialize and benefit from increased total output.
Key Terms & Definitions
- National Income — The total value of all goods and services produced within an economy.
- Circular Flow of Income — A macroeconomic model showing movement of income and expenditure between households, firms, and other sectors.
- Imports — Domestic expenditure on foreign-produced goods and services.
- Exports — Foreign expenditure on domestically produced goods and services.
- Open Economy — An economy that engages in international trade (imports and exports).
- Investment — Spending on capital goods that can increase future production.
Action Items / Next Steps
- Update your circular flow diagram to include imports and exports.
- Review the effects of changes in imports and exports on national income.
- Reflect on the discussion questions: effects of banning imports/exports and the rationale for balanced trade.