CFA Level II Exam · Economic Growth

Convergence Hypotheses: Developed vs Developing Economy Growth

Updated 7 October 2026 · Fact-checked

Convergence hypotheses ask whether poorer economies grow faster and catch up with richer ones. Absolute convergence says all economies reach the same income level. Conditional convergence says each converges to its own steady state. Club convergence says only groups with similar traits converge. To answer, match the vignette's facts to one of these.

Understand Convergence Hypotheses and Growth in Developed vs Developing Economies

Start with the neoclassical idea of diminishing marginal returns to capital. A country with little capital per worker earns a high return on each extra unit of capital. A country with a lot of capital earns a lower return. So poorer countries should grow faster, because investment there is more productive. Also, they can copy technology that richer countries already built.

This logic gives the absolute convergence hypothesis. Poor economies grow faster than rich ones, and per-capita income levels become equal over time, regardless of country traits. In the data, this has not held across all countries. Many poor countries have stayed poor.

Conditional convergence is the version supported better by evidence. Each economy converges to its own steady-state income level, set by its own savings rate, population growth, human capital, institutions and technology. Countries with similar characteristics share a similar steady state. Countries with different characteristics converge to different levels. A poor country far below its own steady state grows faster than a rich one close to its steady state. Poor countries with weak savings or weak institutions can still remain poorer.

Convergence club is the pattern you see when you look across groups. Countries with similar traits share a steady state, so they converge to each other (conditional convergence within the group). Countries with different traits sit in other groups and do not converge to that level. The club pattern is the split into groups: some converge to a high-income level, others to a lower one. Moving into a higher club requires changes in the underlying traits, such as investment in human capital, technology or institutions. Keep the two labels distinct: conditional convergence describes why a country heads to its own steady state, and the club pattern describes the resulting division between groups.

Why might developing economies fail to catch up? Typical reasons: low saving and investment, weak property rights and rule of law, poor health and education, limited access to technology, political instability, corruption, trade barriers and weak financial markets. Endogenous growth theory adds another point. If capital, including human capital and R&D, does not face diminishing returns, developed economies that keep investing in these can keep growing, so poorer economies need not close the gap.

Policies to promote growth follow from the sources of growth: encourage saving and investment, build human capital, support R&D and technology transfer, establish secure property rights and a stable legal system, keep macroeconomic policy stable, open to trade and foreign direct investment, develop financial markets, and invest in infrastructure. Policy changes that move the steady state up help the economy grow toward a higher level.

Key formulas to remember

Absolute convergence: Poor economies grow faster than rich ones; all converge to the same per-capita income; Holds only if economies share the same traits. Weak empirical support across all countries.
Conditional convergence: Each economy converges to its own steady state; growth rate rises with distance below that steady state; Steady state depends on savings, population growth, human capital, institutions and technology.
Convergence club: Countries with similar characteristics converge within a group; groups differ and do not converge to each other; Moving between clubs needs changes in fundamentals such as institutions or human capital.
Neoclassical catch-up logic: Lower capital per worker → higher marginal product of capital → faster growth; Relies on diminishing marginal returns and technology that can be copied.

How to solve Convergence Hypotheses and Growth in Developed vs Developing Economies questions

Use this method for any question on convergence and growth policy. The vignette usually gives growth rates, income levels or country traits.

1Read the question stem first. Decide if it asks for a type of convergence, a reason for a gap, or a policy.
2Find the data in the vignette: income per capita, growth rates, savings, education, institutions, technology access.
3Ask: do the countries share similar traits? If all converge to one level regardless of traits, that is absolute convergence.
4If each country, or each group of similar countries, heads to its own level based on its traits, choose conditional convergence.
5If the question asks about the split of countries into groups, with some converging to a high level and others stuck at a lower one, choose convergence club.
6For why a country lags, link it to a specific weak trait in the vignette: low investment, weak institutions, poor human capital, no technology access.
7For policy, pick the measure that targets the stated weakness and raises the steady state or technology adoption.
8Check that your answer matches the vignette's evidence, not general theory alone.

Quickest way: Match the pattern to the label

When to use it: When the question gives a short description of country growth outcomes and asks you to name the hypothesis.

Everyone ends at the same level regardless of traits: absolute.
Each ends at its own level, set by its traits: conditional.
The result is a split into groups, some converging and others not: club.
For a policy question, find the weakness in the text and pick the policy that fixes it.

Common mistakes in Convergence Hypotheses and Growth in Developed vs Developing Economies

Saying conditional convergence means poor countries never catch up.
The word 'conditional' sounds like a restriction.
Fix: Conditional convergence says growth is faster the further an economy is below its own steady state. Countries with similar traits head to similar levels.
Treating absolute convergence as well supported by the data.
The theory is simple and appears first.
Fix: Remember it needs the strong assumption that economies share the same traits. Evidence across all countries is weak.
Using convergence club and conditional convergence as interchangeable labels.
Both involve convergence to a level set by traits.
Fix: Conditional convergence explains each economy's own steady state. The club pattern is the division of countries into groups with different steady states. Answer the one the question asks about.
Choosing a policy unrelated to the weakness in the vignette.
Students recall a generic list of growth policies.
Fix: Link the policy to the stated trait: weak property rights need legal reform, low skills need education, no technology access needs openness and FDI.
Assuming a faster-growing poor country has already converged.
Growth rate is confused with income level.
Fix: Compare income levels. A country can grow faster and still be far below the other. Convergence is about the gap closing over time.

Worked examples

Example 1

Vignette: An analyst studies two groups of countries. Group A has high savings, strong legal systems and widely educated workforces. Group B has low savings, weak property rights and low school attendance. Over 40 years, countries within Group A moved to similar per-capita income levels, with the poorer ones growing faster. Countries in Group B stayed far below Group A and differ from each other. Q1: Which hypothesis best fits Group A's pattern? Q2: Do the results support absolute convergence across both groups?

Show the solution

Q1: Within Group A, countries share similar traits, so they share a similar steady state. The poorer ones grow faster and move to a common level. This is conditional convergence. The split between Group A and Group B is the convergence club pattern.
Q2: Absolute convergence needs all countries to reach the same income level regardless of traits. Group B stayed far below Group A, so the pattern does not hold across both groups.

Answer: Q1: Conditional convergence; the split between the groups is the club pattern. Q2: No, the evidence does not support absolute convergence.

Example 2

Vignette: A developing economy has low capital per worker and grew 6% a year for a decade. A policymaker notes that corruption is high, few workers finish secondary school and trade barriers limit imports of machinery. Q1: Why might the economy still fail to reach developed-economy income levels? Q2: Which set of policies best raises its long-run income level?

Show the solution

Q1: Low capital per worker gives high returns and fast catch-up growth. But steady-state income depends on institutions, human capital and technology. Corruption, low education and trade barriers lower its own steady state, so it may converge to a level below developed economies.
Q2: Target each weakness: strengthen legal institutions and reduce corruption, invest in education, and reduce trade barriers to import machinery and technology. These raise the steady state.

Answer: Q1: Its steady state is set by weak institutions, human capital and technology access, so it converges only conditionally to a lower level. Q2: Institutional reform, education investment and trade openness.

Exam tips

Look for the words 'regardless of characteristics' (absolute) versus 'own steady state' (conditional).
Use the vignette's country traits to justify why growth differs. Generic answers lose points.
For policy questions, pick the option that matches the weakness described, not the broadest policy.
Do not confuse growth rate with income level. Faster growth does not mean the gap has closed.
Expect distractors that swap the definitions of absolute and conditional convergence. Read each option fully.

Convergence Hypotheses and Growth in Developed vs Developing Economies: frequently asked questions

What is the difference between absolute and conditional convergence?

Absolute convergence says all economies converge to the same income level regardless of their characteristics. Conditional convergence says each economy converges to its own steady state, set by traits such as savings, education and institutions. Conditional convergence has better empirical support.

Why do developing countries often grow slower than developed ones?

Many have low saving and investment, weak institutions, poor health and education, and limited access to technology. These traits lower their steady state, so they do not catch up. Some also face political instability or trade barriers.

What is a convergence club?

It is the pattern where countries with similar characteristics converge to a common level within a group, while other groups with different characteristics do not converge to that level. Moving into a higher club requires changes in fundamentals such as institutions and human capital.

Which government policies promote economic growth?

Policies that encourage saving and investment, build education and health, support R&D and technology transfer, protect property rights, keep macroeconomic conditions stable, and open the economy to trade and foreign investment. Choose the one that fixes the specific weakness in the question.