Development and Its Measurement
What is the Neolithic Revolution?
The Neolithic Revolution was the transition from hunting and gathering to farming, beginning about years ago. People domesticated plants and animals, allowing them to produce food surpluses and live in more settled communities. Agriculture arose independently in several regions, including the Fertile Crescent, the Yangzi valley, New Guinea, Mexico, the Andes, West Africa, and the Amazon basin.
Food surpluses supported a division of labor and contributed to the emergence of political organization. The transition also brought costs: inequality increased in many societies, and the lives of ordinary people in settled agricultural communities may have worsened in some respects.
Please summarize the basic idea of the human development approach, often associated with Amartya Sen.
Amartya Sen’s capabilities approach treats development as the expansion of the substantive freedoms people have to do and be things they value. Income matters because it can help people access those freedoms, but income is a means rather than the ultimate goal. Health, education, political participation, nourishment, and personal security are valuable dimensions of people’s lives in their own right.
The approach distinguishes between functionings, meaning achieved ways of being and doing, and capabilities, meaning the genuine opportunities people have to choose among different possible functionings. A person’s resources alone do not determine their actual opportunities: illness, environmental conditions, violence, social norms, and the distribution of resources within a household can all affect what the person can achieve.
Please explain the basic logic of the financing gap approach. Discuss one reason why this model of development has failed.
The financing gap approach argues that poor countries lack capital and that supplying more capital will generate growth. In the Harrod–Domar model, the predicted growth rate depends on the savings rate divided by the capital-output ratio:
In this expression, the savings rate is represented by , while represents how much capital is needed to produce a unit of output. The model implies that greater savings or investment can raise growth, so foreign aid and capital transfers might help close the financing gap. Rostow’s stages of growth and Lewis’s two-sector model share the broader idea that investment can set development in motion.
A central weakness is that the relationship between aid, investment, and growth is not mechanical. Easterly finds no statistical association between aid and investment in the evidence discussed in class, and investment is not necessary for growth in every case. Outcomes depend on incentives and on how resources are used. Countries receiving capital can follow very different growth paths, so capital alone cannot explain development.
Please discuss three ways in which climate might hinder economic development.
Climate can affect development through several mechanisms. First, heat and other climatic conditions can reduce agricultural productivity and damage yields. Second, high temperatures can impair physical performance and cognitive performance, affecting workers and students. Third, heat can harm health and expand the range of disease vectors. Extreme weather, including droughts, floods, and cyclones, can also damage livelihoods and infrastructure, while rising sea levels threaten low-lying areas.
These risks are especially important because poor countries often have fewer resources to adapt. The course materials describe a climate-development paradox: countries that have contributed relatively little to emissions can face severe climate impacts. One study covered in class estimates that a one-degree Celsius increase in temperature reduces growth by about percentage points in poor countries, with no equivalent effect reported for richer countries in that analysis. Such findings illustrate possible mechanisms, but they do not mean climate alone determines development.
According to Dahl, what are the two key elements of polyarchy or democracy? Please explain each element.
Robert Dahl’s procedural account of democracy has two central dimensions. Contestation means that political competition is real: people can organize, express opposition, and compete for office through elections. Inclusion concerns who is allowed to participate and how extensive the barriers to participation are.
A polyarchy is a regime with high levels of both contestation and inclusion. The framework is useful because it distinguishes between political systems that allow competition but exclude much of the population and those that permit broad participation but little genuine competition.
Please describe some key features of economic development before the Industrial Revolution.
Before the Industrial Revolution, most people lived in poor, primarily agricultural societies and worked as subsistence farmers. Living standards were strongly shaped by population size: productivity gains tended to support population growth rather than produce sustained increases in income per person. This pattern is often called a Malthusian trap.
Settled agriculture did create food surpluses, making specialization and political organization possible, but it did not generate continuous, economy-wide growth in living standards. Before about 1700, even in Europe and China, no more than roughly one-fifth of the population were non-farmers. Political systems were generally autocratic, although the classification of some historical societies is debated.
What is the UN’s Human Development Index (HDI), and is it a good empirical measure of the human development approach?
The Human Development Index is a composite measure intended to represent several dimensions of human development. It combines life expectancy at birth, mean years of schooling for adults, expected years of schooling for children, and the logarithm of gross national income per person adjusted for PPP. The component measures are normalized, and the index combines them using a geometric mean.
The HDI improves on GDP per capita as a summary measure because it includes health and education as well as income. Its components also correspond to important dimensions of human capability. However, it is only a partial empirical representation of Sen’s broader approach. The selection and construction of an index do not fully resolve which capabilities should count or how they should be measured. The HDI also omits dimensions such as political participation, personal security, distribution within countries, and the effective freedom to choose. It is therefore useful for comparison, but it is not a complete measure of human development.
What is the role of technology in the Solow growth model? Why does it matter for long-run growth?
In the Solow model, income per person depends in part on capital per worker. Investment increases capital intensity, while population growth and depreciation reduce it. Because capital has diminishing returns, adding capital raises output but the additional gain becomes smaller. Capital accumulation can therefore produce growth as an economy moves toward its steady state, but it cannot by itself sustain long-run growth in income per person.
Technology changes this conclusion by improving the efficiency with which labor and capital produce output. In the model, technology shifts the production function; long-run growth is driven by technological progress. Technology includes not only new machines or production techniques but also organizational knowledge, laws, and practices. Innovation matters, and so does diffusion: an existing innovation must spread and be adapted to local conditions. The course example of mobile money in Kenya illustrates how a technology can change economic activity without relying solely on large additions of physical capital.
Explain why being landlocked is such a roadblock to economic development. What policy options exist to overcome the problem of being landlocked?
Landlocked countries lack direct access to sea trade, which can raise transport costs and make it harder to reach international markets. More generally, difficult terrain, limited access to navigable rivers, and distance from markets can raise the cost of moving goods. Higher trade costs can restrict specialization, the division of labor, and the spread of technology.
Landlocked countries cannot create coastlines, but they can reduce other barriers. Policy options include improving transport infrastructure, reducing the cost of doing business, and coordinating with neighboring states through regional integration. Regional integration can improve access to markets and transport routes; the African Continental Free Trade Area is an example cited in the course. Encouraging remittances is another option discussed as part of a broader strategy for overcoming the economic disadvantages of distance and limited market access.
Please give and explain three reasons why autocracies might be good for development and three reasons why autocracies might be bad for development.
Autocracies may support development in several ways. First, leaders can make decisions quickly because they face fewer electoral constraints. Second, they may plan over longer horizons and push through costly reforms that could be unpopular in the short term. Third, they may be insulated from some special-interest pressures or impose order in divided societies. These potential advantages depend on what leaders choose to do; they do not guarantee effective or growth-promoting policy.
Autocracies also have serious risks. First, weak accountability can enable corruption, extraction, and policies that serve the ruling coalition rather than the public. Second, citizens may have weak protection for property rights and may face unpredictable government decisions. Third, rulers may rely on patronage and repression instead of providing broad public goods. Autocratic growth outcomes are highly variable, so examples of successful autocrats should be considered alongside cases of stagnation and failure.
What is the Great Divergence and what drove it?
The Great Divergence is the widening difference in economic prosperity between early-industrializing Western Europe and its offshoots and many other world regions. Regional income rankings have persisted over long periods, and the gap widened especially after industrialization began in Britain in the late eighteenth century.
The Industrial Revolution involved technological improvements that substituted machines for some human and animal power, enabling rapid accumulation of physical capital. Steam engines, railroads, and telegraphs helped transform production and transport. Agricultural improvements increased output and supported urbanization, while manufacturing expanded and public-health improvements raised life expectancy. These changes helped move some economies beyond the limits of the Malthusian pattern. After the Second World War, several economies—especially in East and Southeast Asia—grew rapidly and narrowed some of the gap, but development remained uneven.
Please describe the logic underlying the famous one-dollar-a-day measure of absolute poverty. What are its advantages and disadvantages?
The World Bank introduced the one-dollar-a-day international poverty line in 1990. It was based on observed national poverty lines and designed as an absolute threshold for identifying people whose resources were insufficient to meet basic needs. For international comparisons, poverty lines are converted using PPP and adjusted over time for inflation. The line has since been revised; the important idea is a common threshold for absolute poverty, not an unchanging dollar amount.
A common absolute line makes it possible to compare poverty across countries and track it over time. It is easy to communicate and has helped focus attention on extreme deprivation. Its limitations are that the chosen threshold has no single inherent theoretical justification, its memorable label can obscure revisions, and a single cutoff treats people just above and below the line as categorically different even when their circumstances are similar. Measurement also depends on survey quality, prices, and assumptions about people’s differing needs. Poverty is multidimensional, so income or consumption alone cannot show whether people can access health care, education, security, or other basic capabilities.
What is a poverty trap? Explain how it differs from the Solow model’s predictions about convergence.
A poverty trap is a self-reinforcing bad equilibrium in which poverty helps reproduce the conditions that keep people or economies poor. At the household level, poor nutrition or ill health can reduce a person’s ability to work, leading to low wages and continuing deprivation. At the national level, low industrial activity can coexist with poor infrastructure and limited technology, each reinforcing the other. A trap may persist because the feedback loops create increasing returns: a small improvement, such as a modest increase in capital, may not be enough to move the economy into a better equilibrium. A coordinated “big push” is one proposed response.
The standard Solow model instead emphasizes diminishing returns to capital and movement toward a steady state. Poor economies with little capital per worker are predicted to grow relatively quickly as capital accumulates, then slow as they approach equilibrium. This suggests convergence under comparable conditions. Poverty-trap models allow multiple equilibria, including one from which gradual change may not be sufficient to escape. Evidence for broad, persistent macro-level traps and successful big-push aid is not strong, though some micro-level traps may be more plausible.
Please explain three reasons why an unfavorable disease environment makes economic development more difficult.
First, disease reduces health and productivity: illness can limit people’s ability to work and can affect children’s development. Second, treatment absorbs scarce household and public resources that could otherwise be used for other needs. Third, disease has indirect effects. It can contribute to higher fertility, school absenteeism, and impaired cognitive development, which may reduce the accumulation of human capital over time.
Malaria is a prominent example in the course materials. Tropical disease burdens are concentrated in some regions, including tropical Sub-Saharan Africa, and one estimate discussed in class links malaria to a reduction in annual GDP growth of percentage points. The precise causal effects remain contested, but disease can impose costs through multiple channels rather than only through immediate medical expenses.
Please give and explain three reasons why democracy might be good for development and three reasons why democracy might be bad for development.
Democracy can support development by strengthening the rule of law and the protection of property rights. Competitive elections can also make governments more responsive to public needs and encourage the provision of public goods such as health, education, and infrastructure. Finally, democratic institutions provide peaceful ways to manage political conflict and can reduce the risk that leaders ignore major threats to citizens.
Democratic politics can also create trade-offs. Electoral budget cycles may encourage short-term decisions, and politicians may use clientelism or targeted spending to secure support. Organized interest groups can influence policy, while competition among political actors can produce gridlock. Democracies may also choose higher taxes, redistribution, and broader welfare provision, which can create disagreements about the size and role of government. These are potential costs, not evidence that democracy necessarily harms growth.
Please define the term “developing country.”
A developing or less-developed country is one in which a large share of the population cannot meet, or has great difficulty meeting, basic material needs. These include food, housing, water, health care, education, electricity, transport, communications, and physical security. The deprivations associated with unmet basic needs are described as underdevelopment.
The term is broad and does not capture every feature of a country’s circumstances. It is also different from an income-group classification: for example, the World Bank groups countries into low-, lower-middle-, upper-middle-, and high-income categories using gross national income per person.
Identify and describe at least four key features of the economic lives of poor households in low-income countries.
Banerjee and Duflo’s household-survey evidence describes several recurring features:
Large households: Poor households often include many children or extended family members; the reported household sizes range from about six to twelve people.
Food absorbs much of the budget: In the rural households described, roughly of expenditures went to food.
Food choices are not simply calorie-maximizing: Households do not necessarily buy the cheapest food with the most calories. Their spending also reflects preferences and other priorities, including alcohol, tobacco, and festivities.
Work is diversified and insecure: Multiple occupations, temporary migration, and little specialization are common.
Health and service constraints matter: Illness is prevalent, spending on education is often low, and access to formal credit, savings, insurance, secure property rights, transport, health care, and quality schooling may be limited.
These patterns help explain why poverty is not merely a low-income category. Risk, missing markets, health problems, and limited access to services shape the decisions households can make.
Explain what modernization theory is and how it makes it difficult to disentangle the effects of regime type on development.
Modernization theory proposes that economic development transforms society in ways that make democracy more likely. As work becomes more complex, coercing labor may become harder; traditional social structures and values may weaken; and civil society may expand. The resulting hypothesis is that development raises the chances of a transition to democracy.
This creates a causal-inference problem because development may affect regime type as well as regime type potentially affecting development. A correlation between income and democracy cannot establish whether democracy caused prosperity, prosperity encouraged democratization, or other factors affected both. It is also important to distinguish modernization theory’s claim about transitions to democracy from survival theory, which holds that development increases the chances that an existing democracy survives. The evidence discussed in class is consistent with development aiding both transitions and survival, but one within-country study found that rising income did not predict democratization, underscoring that the causal relationship remains debated.
Please discuss two reasons why natural resources can be a “curse” for development.
One possible mechanism is the Dutch Disease. A resource boom can draw labor and capital into the resource sector and contribute to exchange-rate appreciation. This makes other traded goods, including manufactured exports, less competitive. If the boom weakens sectors that generate broader learning and long-run growth, resource wealth can hinder diversification.
A second mechanism is institutional and political. When the state receives substantial external resource rents, it may rely less on broad-based taxation. That can weaken incentives to build state capacity and accountability, while allowing governments to use resource revenue to maintain support. Resource wealth can also create opportunities for corruption. A third potential mechanism is conflict: resources may be looted or become a focus of grievances and armed competition, especially where state capacity is weak.
The resource curse is empirically contested. Resources have supported development in some countries, while others have experienced severe political or economic problems. The consequences may depend on existing institutions and how resource revenues are governed.
Please identify and describe at least three empirical facts about the relationship between economic development and regime type.
Several patterns emerge in the evidence presented in the course:
Rich countries are usually democratic: Most high-income countries are democracies, while poor countries are less likely to be fully democratic. However, the income distributions of democracies and non-democracies overlap substantially.
Average growth rates are not systematically different: Cross-country evidence does not show a consistent average growth advantage for either democracies or autocracies. Many of the fastest growth episodes occur under autocratic rule.
Autocratic growth is more volatile: Autocracies have a wider spread of growth outcomes, including both rapid growth and severe contractions. Democracies tend to have less growth volatility and fewer extreme catastrophes.
Democratic effects differ by outcome: A large review of cross-country analyses found null to weakly positive effects of democracy across governance outcomes overall, with stronger evidence for positive effects on human development.
These are associations and broad empirical patterns, not proof that regime type alone causes development. Measurement, case selection, omitted variables, and reverse causality complicate causal conclusions.
Please define GDP per capita and discuss its advantages and disadvantages as a measure of economic development.
GDP per capita is the value of goods and services produced within a country during a given year, divided by the country’s population. Purchasing power parity, or PPP, adjusts comparisons for differences in local prices, so that the same basket of goods has comparable value across countries. Gross national income differs from GDP because it adjusts for income that nationals earn abroad and income that foreigners earn domestically.
GDP per capita is useful because it provides a readily interpretable approximation of average annual income and allows comparisons across countries and over time. But it is not a complete measure of development. It does not show how income is distributed, whether growth is sustainable, or how people fare in areas such as health, education, political freedom, leisure, happiness, and social connection. It may count some harmful activity as economically valuable, and national output estimates can be difficult to collect and revise. For example, Nigeria’s GDP estimate rose substantially following a statistical update, without a corresponding sudden change in people’s actual circumstances.
What is a rentier state and why is it bad for economic development?
A rentier state is one in which a substantial share of public revenue comes from external rents, often generated by natural resources, and the government is the principal recipient. The economy may rely on these rents rather than on a broad domestic productive sector, and only a small share of the workforce may be involved in generating them.
Resource revenue can reduce the state’s dependence on taxes paid by citizens and firms. If governments can fund themselves without broad taxation, they may face weaker pressure to provide representation, build effective administrative capacity, or respond to citizens. Resource wealth may also support patronage and corruption. These are risks, not automatic results: the impact of rents depends partly on political institutions and how revenues are managed.
Why might the narrative of the “benevolent autocrat” be misleading? Discuss the empirical evidence.
The story of the benevolent autocrat often focuses on visible success cases while neglecting failures. Autocratic growth has “fat tails”: some autocracies experience extraordinary growth, but others experience severe economic decline. Studies of growth episodes find autocratic cases among both the fastest-growing economies and the worst performers. This makes it misleading to infer that autocracy generally produces growth from a few celebrated examples.
Several biases can inflate the apparent prevalence of benevolent autocrats. News coverage may emphasize successes, people may over-attribute outcomes to a leader’s skill, and observers may generalize too quickly from a small number of cases. Political convenience and a preference for decisive action can also make the narrative appealing. China illustrates the need for caution: the same ruling party presided over famine and stagnation before 1978 and rapid growth afterward. The change in outcomes therefore requires attention to policy and institutions, not just regime type. For every celebrated growth case, there are autocracies that stagnate or fail.
What is the Dutch Disease?
The Dutch Disease is a process in which a resource boom weakens other parts of the economy, especially traded manufacturing. The boom can raise the value of the currency, making exports from other sectors more expensive to foreign buyers. It can also pull labor and capital away from non-resource industries and into resource production.
As a result, the resource sector may expand while industries that support diversification, learning, and longer-term productivity weaken. The concern is not simply that a country has natural resources; it is that a resource boom can change prices and investment incentives in ways that make the economy less diversified.
Please explain the theoretical mechanism for the responsiveness of democratic governments. What does it imply for development?
In a democracy, leaders must win competitive elections. Voters can assess incumbents’ records and compare policy proposals, giving politicians an incentive to respond to voter preferences. Contestation makes it possible for an incumbent to lose office, while inclusion gives a larger share of the population an opportunity to influence who governs. Democratic responsiveness may therefore encourage public goods and services and help governments address broad risks such as famine or inadequate health care.
For development, this mechanism suggests that accountable governments may be more likely to provide services that improve people’s health, education, security, and economic opportunities. Evidence discussed in class supports parts of this argument: more competitive Indian states distributed more relief, and women’s suffrage in the United States shifted public spending toward health and sanitation and was associated with reduced child mortality. Responsiveness is not the same as effective development policy, however. Voters may lack information, politicians may use clientelism, and some autocracies may also respond to public needs.