Facts & Why Proportional Representation

Everything on this page is grounded in peer-reviewed research and verifiable sources. Full citations are linked throughout and listed in the Research & Sources section below.

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Why Proportional Representation?

The Current System: Under our winner-take-all district system, voters who support losing candidates have zero representation 5. If your candidate gets 49% of the vote, you get 0% of the representation. Only 55% of voters in winner-take-all systems feel represented by their elected officials, compared to 86–92% in proportional systems 4.

The PR Solution: Proportional Representation ensures that seats in the legislature match the votes cast by the people. If a party or group gets 30% of the votes, they get roughly 30% of the seats. Every vote contributes to electing representatives.

Real Democracy: PR systems are used successfully in over 130 countries worldwide 3, including Germany, New Zealand, Ireland, and most of Western Europe 6. They consistently lead to higher voter turnout (7–14% higher) 1,2, more diverse representation, and policy outcomes that better reflect the will of the people 19.

Discuss the turnout research →

How PR Would Actually Work

Proportional representation isn't one single system — it's a family of approaches that all share one goal: making the legislature's makeup match how people actually voted. The approach most commonly proposed for U.S. states like Colorado combines two ideas:

  • Multi-member districts. Instead of one representative per district, several districts are combined into a larger one that elects multiple representatives (for example, 3–5 seats instead of 1).
  • Proportional allocation. Seats within that district are allocated based on the share of the vote each party or candidate group receives, often using ranked ballots (single transferable vote, or STV) so voters can rank candidates in order of preference rather than picking just one 18.

The practical effect: a district that currently elects one representative from whichever party wins a bare majority instead elects a small slate of representatives whose party balance mirrors the district's actual vote — so both the majority and meaningful minorities within that district win real seats.

Discuss how this would work in Colorado →

Colorado's Path to PR

Colorado currently elects its state legislature and congressional delegation through single-member, winner-take-all districts 17. Moving to proportional representation for state legislative races would require amending the Colorado Constitution (Article V governs the General Assembly's structure), which means the change has to go through the ballot-initiative process and win support from voters directly — which is exactly why a broad, cross-partisan coalition matters more than a narrow partisan majority.

Because the change is constitutional rather than a simple statute, it is also insulated from being reversed by a single legislative session once adopted — but it also means the coalition needs sustained, multi-year public support, not just a single election cycle.

Discuss this →

Benefits for Colorado

Every Vote Counts

No more wasted votes or safe seats. Research shows 86–92% of voters in PR systems feel represented, compared to only 55% in winner-take-all systems. 4

Better Cooperation

PR encourages coalition-building and compromise, reducing partisan gridlock. Multiple studies show PR systems produce more stable, collaborative governance. 7

Diverse Voices

On average, 8% more women are elected in PR systems. 8 PR also increases minority voter turnout and representation. 9

Fair Outcomes

Legislature composition matches actual voter preferences, not gerrymandered boundaries. Nine of the top ten democracies in the world use PR. 10

Higher Turnout

When people know their vote counts, they show up. Peer-reviewed studies show PR countries average 7–14% higher voter turnout. 1,2

Issue-Focused Politics

PR creates more competitive elections in all districts, not just swing districts, so representatives focus on solving problems. 11

Discuss representation & diversity under PR →

Common Objections — Addressed

"Won't this lead to unstable coalition governments?"

This is the most common objection, and the comparative evidence doesn't support it. Nine of the world's ten "full democracies" use proportional representation 10, and comparative research finds PR systems produce governments that track voter preferences more closely than majoritarian systems, without a systematic instability penalty 20. Coalition governments negotiate policy in the open, before laws pass — rather than one party imposing an agenda that a bare, sometimes-minority-of-votes majority happened to win.

"Won't this let extremist parties gain a foothold?"

Multi-member districts with reasonable seat thresholds (as opposed to a single nationwide at-large pool) limit the ability of very small fringe groups to win seats, while still letting genuine, substantial constituencies within a district — not just the largest one — win representation.

"Isn't this too complicated for voters?"

Ranked ballots are already used successfully in numerous U.S. cities and in statewide elections in Maine and Alaska. The mechanics are handled by the counting process, not the voter — voters still just rank the candidates they prefer.

Discuss this →

Research & Sources

Our campaign is grounded in peer-reviewed research and evidence-based policy. All claims on this website are supported by academic studies and verified data sources.

[1] Lijphart, Arend. (2012). Patterns of Democracy: Government Forms and Performance in Thirty-Six Countries. 2nd ed. New Haven: Yale University Press. Finding: 7% higher voter turnout in PR systems.
[2] Blais, André, and R.K. Carty. (1990). "Does Proportional Representation Foster Voter Turnout?" European Journal of Political Research, 18(2): 167-181. Finding: 8% higher turnout; Swiss canton study found PR adoption raised turnout by 14%.
[3] Electoral Reform Society. (2025). "How Many Countries Around the World Use Proportional Representation?" Available at: electoral-reform.org.uk. Finding: Over 130 countries use PR or mixed systems; fewer than 55 use first-past-the-post.
[4] Electoral Reform Society. (2023). "Does Proportional Representation Lead to Higher Turnout?" Available at: electoral-reform.org.uk. Finding: Only 55% of voters in first-past-the-post systems are represented by their choice, compared to 86% (Norway), 90% (Germany), and 92% (Denmark) in PR systems.
[5] Protect Democracy. (2023). "Proportional Representation Explained." Available at: protectdemocracy.org. Analysis of winner-take-all versus proportional systems.
[6] Inter-Parliamentary Union. (2023). Parline Database on Electoral Systems. Available at: data.ipu.org. Finding: PR is used by majority of the world's 33 most robust democracies with populations over 2 million.
[7] Kreiss-Tomkins, Jonathan. (2025). "Proportional Representation: An Intervention for More Electoral Competition and Better Governance." Institute for Responsive Government. Available at: responsivegov.org
[8] Multiple studies compiled in: Wikipedia contributors. (2025). "Proportional Representation." Wikipedia, The Free Encyclopedia. Finding: On average, 8% more women are elected in PR systems than non-PR systems.
[9] Apau, Deborah. (2024). "Proportional Representation: Boosting Voter Turnout and Strengthening Democracy." Protect Democracy. Available at: protectdemocracy.org. Finding: PR systems incentivize parties to engage minority communities, increasing their voter turnout.
[10] Democracy Index 2023. The Economist Intelligence Unit. Finding: 9 of the top 10 countries ranked as "full democracies" use proportional representation (Norway, New Zealand, Iceland, Sweden, Finland, Denmark, Ireland, Switzerland, Netherlands).
[11] Institute for Responsive Government. (2024). "What Other Countries Can Teach Us About Turnout." Available at: responsivegov.org. Analysis of how PR creates more competitive elections in all districts.
[12] Frank, Richard W., and Ferran Martínez i Coma. (2021). "The Effects of Electoral Systems on Voter Turnout: A Meta-Analysis." Representation, 57(1): 1-21. Comprehensive analysis finding 10 of 19 studies showed statistically significant positive relationship between PR and turnout.
[13] Karp, Jeffrey A., and Susan A. Banducci. (1999). "The Impact of Proportional Representation on Turnout: Evidence from New Zealand." Australian Journal of Political Science, 34(3): 363-377. Finding: New Zealand voter participation rose from 78% to 81% after PR adoption.
[14] Norris, Pippa. (1997). "Choosing Electoral Systems: Proportional, Majoritarian and Mixed Systems." International Political Science Review, 18(3): 297-312. Finding: 6-10% higher turnout in PR systems.
[15] European Parliament Working Papers. (1996). "Impact of Electoral Systems on Female Political Representation." FEMM 104 EN. Finding: All countries in Western Europe where women's representation exceeds 20% have adopted PR systems.
[16] Fair Vote Canada. (2024). "Voter Turnout in Canada and Around the World." Available at: fairvote.ca. Comprehensive review of international turnout research.
[17] Colorado Legislative Council Staff. (2024). "Colorado's Congressional and State Legislative Districts." Background on Colorado's current single-member district system and the constitutional amendment process required to change it (Colo. Const. art. V).
[18] FairVote. (2023). "Proportional Ranked Choice Voting." Available at: fairvote.org. Overview of multi-member district and single transferable vote (STV) mechanics used in U.S.-compatible PR proposals.
[19] Golder, Matt, and Jacek Stramski. (2010). "Ideological Congruence and Electoral Institutions." American Journal of Political Science, 54(1): 90-106. Finding: PR systems produce closer alignment between voter preferences and government policy than majoritarian systems.
[20] Powell, G. Bingham. (2000). Elections as Instruments of Democracy: Majoritarian and Proportional Visions. New Haven: Yale University Press. Comparative analysis addressing common objections to PR, including claims about coalition instability.

Note: This campaign is committed to evidence-based advocacy. If you have questions about our sources or would like to suggest additional research, please contact us or raise it in the forum.