Example of Income Extremes in 2019: South Sudan and United Arab Emirates

Income Levels in the Poorest 10% of Countries (2019)

Limitation of Average Income in Visualizing Inequality

A chart displays all the world's countries, arranged from poorest to richest based on their average daily income in a specific year. The income is measured in international dollars to account for differences in purchasing power. In this chart, the width of the bar for each country represents its total population. By examining this method of visualization, what is the most significant limitation for understanding the full picture of global economic inequality?

Evaluating Data Representation in Global Income Comparison

Imagine a chart that visualizes global income distribution. On this chart, each country is represented by a rectangular bar, and countries are arranged along the horizontal axis from poorest to richest. The height of each bar indicates the country's average daily income, and the width of the bar represents its total population. If Country X has a bar that is very wide but not very tall, while Country Y has a bar that is very narrow but very tall, what is the most accurate conclusion you can draw?

Evaluating Methods for Global Income Comparison

A chart is designed to compare the economic well-being of different countries by arranging them from poorest to richest based on average daily income. To make the comparison valid, all incomes are converted into 'international dollars'. What would be the most significant analytical error if the chart's creator had instead used nominal market exchange rates to convert all incomes to a single currency, like the US dollar?

A researcher wants to create a visual comparison of economic well-being across all countries. The plan is to represent each country with a bar, arranged from poorest to richest. To do this correctly, several steps must be taken in a specific order. Arrange the following steps in the logical sequence a researcher should follow.

A chart visualizes global income by arranging countries from poorest to richest along a horizontal axis. The width of each country's bar represents its population, and the height represents its average daily income. The horizontal axis is scaled to show the cumulative percentage of the world's population. If a very wide bar representing a single, large country is positioned such that it crosses the 50% mark on the cumulative population axis, what is the most accurate inference?

A chart visualizes global income by representing each country as a rectangle, with countries arranged from poorest to richest. The height of each rectangle corresponds to the country's average daily income, and the width corresponds to its population. If Country A and Country B have rectangles of the exact same height, but Country A's rectangle is three times wider than Country B's, what can be concluded about the total daily income of the entire population of Country A compared to Country B?

Critiquing Policy Conclusions from Average Income Data

Evaluating Data Timeliness in Economic Analysis

Figure 1.5: Visualizing Within-Country and Between-Country Income Distribution (1980 vs. 2020)