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Study Guide: APComp: Unit 2, Political Institutions - Comparing Electoral Systems, Single-Member Districts, Proportional Representation, Mixed Systems
Source: https://www.fatskills.com/ap-us-government-politics/chapter/apcomp-unit-2-political-institutions-comparing-electoral-systems-single-member-districts-proportional-representation-mixed-systems

APComp: Unit 2, Political Institutions - Comparing Electoral Systems, Single-Member Districts, Proportional Representation, Mixed Systems

By Fatskills Exam Guides Team — the exam nerds behind 28,500+ quizzes and 2.1M practice questions across 500+ global exams.

⏱️ ~4 min read

Comparing Electoral Systems

What This Means

Electoral systems determine how people choose their leaders and representatives. This matters because it affects how power is distributed and who gets to make decisions. In the UK, for example, the first-past-the-post system has led to a two-party dominance, with the Conservative and Labour parties often competing for power.

Key Terms & Concepts

  • Single-Member Districts (SMDs): A system where voters choose one representative from a single district. Example: The UK's House of Commons uses SMDs.
  • Proportional Representation (PR): A system where seats are allocated based on the percentage of votes each party receives. Example: Germany's Bundestag uses a mixed PR system.
  • Mixed Systems: A combination of SMDs and PR. Example: Germany's Bundestag uses a mixed system, with 299 SMDs and 299 PR seats.
  • Electoral Threshold: The minimum percentage of votes a party must receive to win seats. Example: In Mexico, the electoral threshold is 2%, meaning parties must receive at least 2% of the vote to win seats.
  • Multi-Member Districts: A system where voters choose multiple representatives from a single district. Example: In Nigeria, some states use multi-member districts.
  • Closed-List Systems: A system where voters choose a party, and the party chooses the representative. Example: In Russia, the State Duma uses a closed-list system.
  • Open-List Systems: A system where voters choose a party and a specific representative. Example: In Iran, the Majlis uses an open-list system.
  • First-Past-The-Post (FPTP): A system where the candidate with the most votes wins. Example: The UK's general election uses FPTP.
  • Instant-Runoff Voting (IRV): A system where voters rank candidates, and the winner is determined through multiple rounds of counting. Example: Some cities in the US use IRV.
  • Electoral College: A system where voters indirectly elect a president through a complex system of electors. Example: The US presidential election uses an electoral college system.

How This Works in Practice

  • In the UK, a vote of no confidence can force a prime minister to resign.
  • In Germany, the mixed system has led to a coalition government between the CDU and FDP parties.
  • In Mexico, the electoral threshold has led to the exclusion of smaller parties from the Chamber of Deputies.
  • In Nigeria, multi-member districts have led to a fragmented party system.
  • In Russia, the closed-list system has led to a lack of representation for opposition parties.

Common Misunderstandings

  • Misunderstanding: Proportional representation always leads to coalition governments.
  • Correction: While PR systems often lead to coalition governments, it's not a guarantee. Example: In Germany, the CDU and FDP have formed a coalition government, but in other countries, PR systems have led to single-party governments.
  • Misunderstanding: Single-member districts always lead to a two-party system.
  • Correction: While SMDs can lead to a two-party system, it's not a guarantee. Example: In the UK, the SMD system has led to a two-party dominance, but in other countries, SMDs have led to multi-party systems.
  • Misunderstanding: Mixed systems are always more democratic than single-member districts.
  • Correction: While mixed systems can be more democratic, it depends on the specific system. Example: In Germany, the mixed system has led to a more representative parliament, but in other countries, mixed systems have led to a lack of representation for opposition parties.

Quick Comparison Table

Country Electoral System Number of Chambers
UK Single-Member Districts 1
Germany Mixed System 2
Mexico Mixed System 2

Last-Minute Exam Cram

  • A 'state' is not the same as a 'government' – the state is the permanent institution, the government is temporary.
  • The UK uses a first-past-the-post system in general elections.
  • Germany's Bundestag uses a mixed proportional representation system.
  • Mexico's Chamber of Deputies uses a mixed system with an electoral threshold.
  • Nigeria uses multi-member districts in some states.
  • Russia's State Duma uses a closed-list system.
  • Iran's Majlis uses an open-list system.
  • The US presidential election uses an electoral college system.
  • Instant-runoff voting is used in some cities in the US.
  • Proportional representation systems often lead to coalition governments.
  • Single-member districts can lead to a two-party system.
  • Mixed systems can be more democratic than single-member districts.
  • Electoral thresholds can exclude smaller parties from parliament.
  • Closed-list systems can lead to a lack of representation for opposition parties.