Source: Institutions, Policies, & Cross-Country Differences in Income and Growth
Tags: economic freedom, EFW index, purchasing power parity, PPP, GDP per capita, cross-country income differences, institutional quality, macroeconomics, income inequality between nations
Difficulty: Intermediate Prerequisites: Basic understanding of GDP, economic growth concepts (Chapters 15–16 recommended).
This chapter asks a straightforward question: why are some countries rich and others poor, and why do their growth rates differ so dramatically? It sits near the end of most macroeconomics courses because it pulls together ideas about institutions, property rights, trade, and government policy into a single framework. The central argument is that a country's institutional and policy environment, measured here by the Economic Freedom of the World (EFW) index, is the primary driver of long-run income and growth differences. If you have followed the earlier chapters on GDP, growth theory, and the role of investment, this is where those threads converge into a comparative, cross-country picture.
Countries vary enormously in income and growth, and the evidence points to institutional quality as the main explanation. The Economic Freedom of the World index measures how well a country's policies support voluntary exchange, property rights, and open markets. Countries that score higher on economic freedom tend to be richer, grow faster, attract more investment, and have lower poverty rates.
Purchasing power parity (PPP)
A method of comparing incomes across countries by using the cost of a common bundle of goods in each country, rather than market exchange rates, to convert local currencies into a common unit (usually U.S. dollars).
In simple terms, PPP asks: "How much does everyday stuff cost here?" and uses that answer to make fair income comparisons. Exchange rates miss this because they are driven partly by capital flows and do not reflect the prices of goods that are not traded internationally.
Economic freedom
The degree to which a country's institutions and policies support voluntary exchange, market allocation of resources, freedom to compete, and protection of people and their property.
Think of it as the institutional environment that lets individuals and businesses make their own economic choices without excessive interference or insecurity.
Economic Freedom of the World (EFW) index
A composite index using 42 components to rate how consistent a nation's institutions and policies are with personal choice, voluntary exchange, open markets, and protection of private property. Developed with input from Nobel laureates Milton Friedman, Gary Becker, and Douglass North.
In simple terms, it is a scorecard for how "economically free" a country is, and it correlates strongly with income, growth, and investment outcomes.
Less developed countries (LDCs)
Countries with relatively low per capita income and limited industrialisation. In the context of this chapter, LDCs appear on both the fastest-growing and the fastest-declining lists, depending on their institutional quality.
Think of it as the broad category of "poorer countries," where outcomes diverge sharply based on whether institutions are sound or not.
Countries use different currencies, so comparing incomes requires converting to a common unit.
Exchange rates are a tempting conversion tool, but they are distorted by capital movements and fail to capture the prices of goods not traded on international markets.
Economists therefore prefer the PPP method: price a common basket of goods in each country, estimate the purchasing power of each currency from that basket, and convert incomes accordingly.
PPP-adjusted figures give a more accurate picture of what people can buy with their income in their own country.
The ten fastest-growing economies (apart from Ireland) were LDCs at the start of the 1980s. China and India, the world's two most populous countries, were on this high-growth list.
These high-growth economies grew at annual rates of 4.1% or more, roughly double the rate of most high-income countries. This has narrowed the gap with richer nations since 1990.
LDCs also dominate the worst-growth list. Countries at the bottom were not merely poor; their incomes were falling, meaning they were diverging further from the rest of the world.
The takeaway: being a low-income country does not determine your growth path. Institutions do.
Gains from trade, entrepreneurial discovery, and investment depend on institutions that support voluntary exchange, market allocation, freedom to compete, and property protection.
These ingredients together form the concept of economic freedom.
To achieve a high EFW rating, a country must:
Provide secure protection of privately owned property
Provide evenhanded enforcement of contracts
Maintain a stable monetary environment
Keep taxes low
Avoid barriers to domestic and international trade
Rely on markets rather than governments to allocate goods and resources
The index reflects the institutional and policy factors that economic theory identifies as key sources of growth.
EFW ratings are available for 122 countries over the 1990–2007 period.
Most persistently free: Hong Kong, Singapore, New Zealand, the United States, and Switzerland.
Least free: Myanmar, the Democratic Republic of Congo, Guinea-Bissau, Zimbabwe, and Burundi.
When countries are sorted into quartiles by EFW rating, the relationship between freedom and income is stark.
Per-person income in the freest quartile was approximately eight times that of the least free quartile.
Countries with higher EFW scores have achieved:
Higher incomes per person
More rapid growth rates
Lower poverty rates
Higher investment rates
Greater productivity per unit of investment
The PPP method is why economists use "PPP-adjusted GDP per capita" when comparing living standards. Without it, a country with a weak currency but low domestic prices would look poorer than it is. This matters for everything from World Bank poverty estimates to policy debates about foreign aid.
The EFW index is used by researchers and policy organisations worldwide to benchmark countries and track whether reforms are moving in the right direction. When a country liberalises trade or strengthens property rights, its EFW score rises, and the data suggest real income gains follow.
"Exchange rates are the best way to compare incomes across countries." They are not. Exchange rates reflect capital flows and traded-goods prices, missing the cost of non-traded goods entirely. PPP is more accurate for welfare comparisons.
"If a country is poor today, it will stay poor." The data show LDCs on both the fastest-growing and fastest-declining lists. Institutional quality, not starting income, determines the trajectory.
"Economic freedom just means low taxes." Low taxes are one of six broad areas. The EFW index also covers property rights, contract enforcement, monetary stability, trade openness, and the role of markets versus government.
"High growth in LDCs is automatic because they start from a low base." Only LDCs with sound institutions grow rapidly. Many LDCs with poor institutions are falling further behind, not catching up.
⚠️ Be able to explain why PPP is preferred over exchange rates for cross-country income comparisons. This is a common exam question.
⚠️ Know the six requirements for a high EFW rating (property protection, contract enforcement, monetary stability, low taxes, trade openness, market reliance).
⚠️ The "eight times" income gap between the freest and least free quartiles is a specific, testable figure.
⚠️ Understand that LDCs appear on both ends of the growth spectrum, and be prepared to explain why (institutions).
True or false: Exchange rates are the most reliable way to compare living standards across countries. False. PPP-adjusted comparisons are preferred because exchange rates are distorted by capital flows and non-traded goods.
Fill in the blank: The EFW index uses ___ separate components to measure economic freedom. 42.
True or false: All less developed countries have poor growth records. False. LDCs with sound institutions are among the fastest-growing economies; LDCs with poor institutions are among the worst.
Fill in the blank: Income per person in the freest quartile of countries was about ___ times the figure for the least free. Eight.
Q: Why do economists prefer the purchasing power parity method over exchange rates when comparing incomes across countries?
A: Exchange rates are influenced by capital movements and do not reflect the prices of goods not traded in international markets, making them an inaccurate measure of purchasing power. PPP uses the cost of a common bundle of goods in each country to estimate each currency's purchasing power, giving a more accurate comparison of real living standards.
Q: List three of the six requirements for a country to achieve a high EFW rating.
A: Any three of: secure protection of private property, evenhanded contract enforcement, stable monetary environment, low taxes, absence of trade barriers (domestic and international), and reliance on markets rather than government for resource allocation.
Q: What does the data show about the relationship between economic freedom and per-person income?
A: There is a strong positive relationship. Countries in the freest quartile of the EFW index had per-person incomes approximately eight times higher than countries in the least free quartile. Higher economic freedom is also associated with faster growth, lower poverty, more investment, and greater productivity per unit of investment.
Q: Why do some LDCs grow rapidly while others fall further behind?
A: The difference is institutional quality. LDCs with sound institutions can grow rapidly by copying technologies and business practices from high-income countries, and they attract investment because returns on capital are higher in capital-scarce economies. LDCs with poor institutions stifle gains from trade, entrepreneurship, and investment, so they continue to perform poorly or even regress.
This material connects directly to earlier chapters on GDP measurement and economic growth. The emphasis on property rights and contract enforcement ties back to the role of institutions in encouraging investment and innovation (Chapter 16 in most textbooks). The discussion of trade openness as a component of economic freedom also links to the gains-from-trade material covered in international trade chapters.
purchasing power parity, PPP, exchange rate comparison, GDP per capita, income differences across countries, economic freedom, Economic Freedom of the World, EFW index, institutional quality, property rights, contract enforcement, free markets, trade openness, LDCs, less developed countries, cross-country growth, Milton Friedman, Gary Becker, Douglass North, macroeconomics Chapter 17