Revision summary
States are unlike in size, history, and capacity, so the unit of comparison is not automatic. Conceptual stretching, Galton’s problem, and selection bias are standard difficulties. Data are political products, and language changes the meaning of institutions. Interdependence means States are not independent experiments. Designs such as most-similar cases reduce error; they do not remove it.
Model answer
Introduction
Comparing States is the core of Comparative Politics, yet States differ in size, history, language, and data. The difficulty is to compare without false identity and without giving up generalisation.
Body
Conceptual and unit problems
- Sartori’s conceptual stretching appears when one word, such as democracy or federalism, is applied to unlike regimes.
- The State as a unit is not the same object in a small island, a continental federation, and a weak post-conflict territory.
- Galton’s problem appears when States are not independent cases because they copy laws, parties, or constitutions from one another.
Method and data
- Small-N comparison cannot control every variable; large-N work often lacks valid indicators for the same idea in every country.
- Official statistics, election results, and survey items are produced by States and may hide repression or informal power.
- Language, legal tradition, and political culture change the meaning of a vote, a court, or a party label.
Politics of comparison
- Selection bias appears when only successful or only failed States are studied.
- Levels of analysis mix when a scholar compares a cabinet in one country with a whole region in another.
- Robert Keohane’s complex interdependence and world-economy hierarchies mean that two States are never isolated laboratories.
How the field still proceeds
- Most-similar and most-different designs, process tracing, and careful concept formation reduce, but do not erase, these difficulties.
Flow diagram
flowchart TD S[Compare States] --> C[Concept stretching] S --> D[Data and language] S --> I[Interdependence of cases] C --> L[Limits of generalisation] D --> L I --> L
Conclusion
Comparing States is difficult because concepts, data, dependence among cases, and unequal power distort the objects being compared. The political scientist’s task is disciplined comparison, not the claim that States are identical units.
Quick related
Students also ask
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How does democratic politics construct citizenship?
Next question on this syllabus topic (2023 · Q1(c)). View answer →
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Should comparison be abandoned because States differ?
No. Difference is the reason to compare. The requirement is clear concepts and honest limits.
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Is a single-country study not comparative?
It becomes comparative when it uses concepts and questions that other cases can also answer.
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