Week 9 — Spread, Lines, and Labels: Reading Global Inequality Figures — Traditional alternative (no AI)

Instructors: publish this instead of the adaptive version if you prefer, and unpublish or delete the adaptive one.

Assignment 8 of the term — read the cross-national inequality and poverty figures, work out what they say, and explain to someone outside sociology why a higher poverty count is not the same as a poorer world.

This week you learned how the world's countries are ranked into layers, how GNI and GDP per capita can hide how income is shared, how the International Poverty Line is drawn and why moving it moved the count, and how modernization, dependency, and world-systems theory explain the gaps. In Week 7 you learned to keep a median apart from a mean and to treat a poverty line as a drawn line; this week you use those habits on the whole world's figures. In this assignment you work four short problems, interpret each one, and explain a finding to someone who has never studied sociology. This week's lecture tutorial, quiz, discussion, and Sociology in Action Workshop practice the same ideas from other angles.

The task

You will use these figures, all from this week's chapter:

• The Gini index for 2022, on the 0-to-100 scale, from the World Bank Poverty and Inequality Platform as published by Our World in Data: Slovakia 24.1, Norway 26.9, Sweden 31.6, Germany 33.7, United States 41.7, Brazil 51.9, South Africa 54.1. High-income countries' figures measure income after taxes and benefits; most low- and middle-income countries' figures use a consumption measure.
• The International Poverty Line (World Bank, via Our World in Data): since June 2025 it is 3.00 dollars a day in 2021 international prices, raised from 2.15 dollars a day in 2017 prices. About 817 million people, roughly one in ten, lived below the new line in 2024, an estimate about 125 million higher than under the old line.
• The fiscal year 2027 income groups (World Bank): low income, 1,175 dollars of GNI per capita or less; lower-middle, 1,176 to 4,635; upper-middle, 4,636 to 14,375; high, above 14,375.
• Two illustrative cases invented for this assignment: a country with a gross national income of 50,000,000,000 dollars and 10,000,000 people, and a village of five households in which four earn 2,000 dollars a year each and one earns 22,000 dollars.

Work these four problems, showing your arithmetic:

1. For 2022 the World Bank Poverty and Inequality Platform, as published by Our World in Data, gives South Africa a Gini index of 54.1 and Slovakia 24.1, on the 0-to-100 scale. By how many points do the two values differ?
2. Under the World Bank's new International Poverty Line of 3.00 dollars a day, about 817 million people lived in extreme poverty in 2024, an estimate about 125 million higher than under the old line of 2.15 dollars a day. About how many million people would the old line have counted?
3. An illustrative country has a gross national income of 50,000,000,000 dollars and a population of 10,000,000. What is its GNI per capita in dollars?
4. An illustrative village has five households: four earn 2,000 dollars a year each and one earns 22,000 dollars. What is the average household income in dollars?

Beside each answer, add one brief interpretation of what that value shows and one limit of it. For problem 1, say what the Gini index measures and over whom, explain why the gap is counted in points rather than percentage points, and say whether a Gini value tells you which country is richer. For problem 2, say what a poverty line is, explain why the rise in the count came from moving the line rather than from falling incomes, say why 3.00 and 2.15 cannot be subtracted as the same dollars, and say whether the figures show a correlation, a cause, or neither. For problem 3, name the income group the country falls in and explain why that label describes the country, not a typical resident. For problem 4, compare the average with the income of the middle household and explain what an average per head, like GDP per capita, hides.

Explain it to a non-expert

Your cousin has never studied sociology and reads a headline: "World poverty jumps: 125 million more people in extreme poverty." Your cousin asks whether the world got poorer. Write a 3–5 sentence message to your cousin that explains in everyday words what a poverty line is, says what moving the line did to the count, separates that one-time jump from the long-run trend, and names one limit, such as that the count is an estimate built from surveys or that it says nothing about why people are poor. Explain any technical term in everyday words. More than one accurate message can be defensible.

For a different, ungraded example, imagine a friend who hears that a public library's count of "active members" fell sharply this year and asks whether people stopped reading. Model answer: "Not necessarily. The library changed what counts as active, from one visit a month to one visit a week, so the same readers were sorted differently. A count is only as fixed as its definition. The limit is that the count still can't tell you how much anyone reads at home."

Use that pattern for your message to your cousin, with your own explanation and evidence.

Show your arithmetic. A reader should be able to reproduce every number you report from the values above without guessing which values or steps you used.

Deliverables

Submit a single data-reading report containing:

• the four answers, each with the arithmetic shown and a brief interpretation of what that value shows and one limit of it;
• your message to your cousin, explaining a poverty line in everyday words, saying what moving the line did to the count, separating that jump from the long-run trend, and naming one limit; and
• a one-line restatement of the values you used, so your results are reproducible.

Keep it to roughly one page. Clear and correct beats long.

Choose how you show it. Present your report as written text, or as a recorded audio or video explanation of about three minutes with a transcript, or as a labelled diagram of the figures with a short note. Every form is graded by the same scoring criteria. Submit in any accessible file type or as a link; a recorded response may be submitted as audio or video with a transcript, or as text.

How you'll be graded

The full analytic rubric is attached to this assignment in Canvas.

Academic integrity and AI use

This version is designed to be completed without AI: do the computations, the interpretations, and the writing yourself, without any AI tool. You may use a calculator or a spreadsheet for the arithmetic. Submitting AI-generated work as your own, or copying another student's numbers, is an integrity violation under the course policy.

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