Comparing development indicators means describing how two countries differ on specific measures, using the figures, without turning the result into a verdict on which country matters more. Questions ask you to compare, explain a difference or evaluate how useful a measure is. This lesson belongs to the development, population and environment module.
How do you compare fairly, step by step?
- Name each indicator and its unit, for example income per person in US dollars.
- State who is higher on each, with the size of the gap.
- Say whether the indicators agree. If they point in different directions, say so.
- Add a limit: what the indicator does not measure, or what date the figures come from.
- Word the conclusion about the data, not about the countries’ worth.
Worked example
Tessoria and Brenia are fictional. Figures are for the same year.
| Indicator | Tessoria | Brenia |
|---|---|---|
| Income per person (US$ a year) | 9,000 | 6,500 |
| Life expectancy at birth (years) | 74 | 78 |
| Mean years of schooling | 8.0 | 9.5 |
Income: Tessoria is higher by 9,000 − 6,500 = US$2,500, which is 2,500 ÷ 6,500 × 100 ≈ 38.5% higher than Brenia.
Life expectancy: Brenia is higher by 78 − 74 = 4 years.
Schooling: Brenia is higher by 9.5 − 8.0 = 1.5 years.
A fair comparison: “Tessoria has the higher income per person, but Brenia scores higher on life expectancy and schooling, so the indicators do not point the same way. Income per person is an average and says nothing about how it is shared, and the figures are for one year only.”
Notice what is missing: any sentence saying one country is “better” or “more successful”.
The mistake to watch for
Mistaken answer: “Tessoria is more developed than Brenia because its income is higher.”
It uses one indicator to judge the whole country. Brenia is ahead on two of the three.
The correction is to name the indicator in every claim: “Tessoria has higher income per person.” Reserve broad statements for when several indicators agree, and say how you weighed them.
A second slip is mixing percentage points and percentages. If Brenia’s literacy were 92% and Tessoria’s 88%, the gap is 4 percentage points, not 4%.
Check yourself
1. Brenia’s income per person rises from US$6,500 to US$7,150. Find the percentage increase.
Show answer
Increase = 7,150 − 6,500 = 650. 650 ÷ 6,500 × 100 = 10%.
2. Literacy in Kolmar rises from 80% to 84%. State the change in percentage points and as a percentage.
Show answer
4 percentage points. As a percentage change: 4 ÷ 80 × 100 = 5%.
3. Which statement is better supported by the table above? (a) “Brenia is a better country.” (b) “Brenia has higher life expectancy than Tessoria.”
Show answer
(b). It names an indicator and matches the figures. Statement (a) is a judgement of worth that the data cannot support.
Where this leads next
Next, assess an environmental model using supplied evidence. The earlier module on output growth and living standards covers why income per person is only one measure. The ratio interpretation tool helps with comparing figures.
Fair wording is a skill that improves quickly with feedback on your own sentences, which is a natural fit for online one-to-one Economics tuition.