Polisci Collective Action Commons Social Choice And Voting

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name: polisci-collective-action-commons-social-choice-and-voting
description: "Use for the formal core that generalises well beyond politics: collective action problems and free riding, the commons and Ostrom's correction showing when communities do successfully self-govern, social choice including Arrow's and Gibbard-Satterthwaite's impossibility results and what they actually rule out, and voting systems with their real properties and failure modes."
---

# Political Science and Governance: Collective Action Problems, the Commons and Ostrom's Correction, Social Choice, and Voting Systems

> **Part 2 of 6** of the *Political Science, Human Systems and Governance* reference (plugin `political-science-human-systems-governance`), covering §5–§8. Sibling skills: `polisci-what-the-field-establishes-power-the-state-and-theory` (§0–§4), `polisci-constitutional-design-electoral-systems-and-institutions` (§9–§13), `polisci-bureaucracy-parties-voter-behaviour-and-polarization` (§14–§18), `polisci-regimes-state-capacity-corruption-ir-and-field-problems` (§19–§25), `polisci-reference` (§26–§31). Section numbers are shared across the set; a reference written as §N → `skill` points into that sibling skill.
>
> **Currency:** The theory is stable. Two areas are live. See §26 → `polisci-reference` for current democracy measurement, and the scholarly dispute about whether those measurements are reliable.

> **⚠️ A note on how this document handles contested questions.** ⚠️ **Political science
> contains robust empirical findings, contested empirical findings, and normative
> disputes that evidence cannot settle. This document tries to say which is which** (§1 → `polisci-what-the-field-establishes-power-the-state-and-theory`),
> **and where a question is genuinely contested it presents the strongest version of more
> than one position rather than picking.** ⚠️ **Where I report a finding, I attribute it;
> where scholars disagree, I say so.**
>
> **Complements a civil/industrial engineering reference (institutions as accumulated
> failure logs), a pedagogy reference (evidence quality in social science), and an
> economics-adjacent treatment of collective action.**
>
> **⚠️ GOTCHA** boxes mark the results that are counterintuitive or routinely misstated.
>
> **The three ideas that organize this document:**
> 1. **⚠️ COLLECTIVE ACTION PROBLEMS are the discipline's deepest structure** (§5–§6).
>    **Individually rational behaviour producing collectively bad outcomes explains
>    government, taxation, regulation, unions, cartels and treaties — and Ostrom's work
>    showed the standard remedies are not the only ones.**
> 2. **⚠️ INSTITUTIONS SHAPE BEHAVIOUR, and the effects are often perverse** (§9–§15 → `polisci-constitutional-design-electoral-systems-and-institutions`, `polisci-bureaucracy-parties-voter-behaviour-and-polarization`).
>    **Electoral rules, veto points and federal structures produce predictable
>    consequences that designers frequently did not intend.**
> 3. **⚠️ MEASUREMENT IS THE FIELD'S BINDING CONSTRAINT** (§25 → `polisci-regimes-state-capacity-corruption-ir-and-field-problems`, §26 → `polisci-reference`). **Most interesting
>    political concepts — democracy, power, legitimacy, polarization — are hard to measure,
>    and disputes that look substantive are often measurement disputes underneath.**

---

## §5. ⚠️ Collective Action Problems

> **⚠️ The deepest structure in the discipline: situations where individually rational
> behaviour produces collectively worse outcomes for everyone.**
```
⚠️ PRISONER'S DILEMMA  ⚠️ defection dominates individually,
   mutual cooperation is better for both. ⚠️ ITERATION changes
   this — Axelrod showed reciprocal strategies do well in repeated
   play, so the SHADOW OF THE FUTURE is what sustains cooperation
⚠️ PUBLIC GOODS  ⚠️ non-rival and non-excludable → free riding →
   undersupply. ⚠️ The standard justification for taxation
⚠️ OLSON'S LOGIC  ⚠️ SMALL CONCENTRATED groups organize more
   easily than large diffuse ones. ⚠️ THEREFORE policy tends to
   favour concentrated interests over diffuse ones even under
   perfect democracy — this is the structural explanation for
   why narrow benefits and dispersed costs are so common
   ⚠️ Hence SELECTIVE INCENTIVES: unions and professional bodies
   supply private benefits to fund the collective good
⚠️ COORDINATION problems (a focal point suffices) are DIFFERENT
   from cooperation problems (⚠️ enforcement is needed)
⚠️ PRINCIPAL-AGENT  ⚠️ voters→politicians→bureaucrats→street level.
   Information asymmetry at every link (§14)
⚠️ TIME INCONSISTENCY  ⚠️ today's government cannot bind tomorrow's,
   which is why independent central banks and constitutional
   entrenchment exist
```

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## §6. ⚠️ The Commons, and Ostrom's Correction

**⚠️ Hardin's "Tragedy of the Commons" (1968) argued shared resources are inevitably
overexploited, and that the remedies are privatization or state control.**
> **⚠️ GOTCHA — Ostrom's Nobel-winning work substantially overturned the "inevitably"
> part, and this is one of the field's genuinely important empirical corrections.**
> ⚠️ **Ostrom documented many real, durable common-pool resource regimes — irrigation
> systems, fisheries, alpine pastures, forests — governed successfully for centuries by
> the users themselves, with neither privatization nor state control.**
> **⚠️ She also noted Hardin's example was an OPEN ACCESS resource, not a managed commons,
> and the two are different things.**

**⚠️ Ostrom's design principles for enduring commons institutions** (⚠️ empirically derived,
not deduced): ⚠️ **clearly defined boundaries; rules matched to local conditions;
collective-choice arrangements letting users modify their own rules; monitoring by
accountable monitors; GRADUATED sanctions; accessible conflict resolution; recognized
rights to organize; and nested enterprises for larger systems.**
**⚠️ The general lesson is broader than commons**: ⚠️ **there is frequently a third option
between market and state, and institutional solutions that emerge locally can outperform
imposed ones — while also being vulnerable to scale, mobility and outside pressure.**

---

## §7. ⚠️ Social Choice

```
⚠️ CONDORCET PARADOX  ⚠️ majority preferences can CYCLE: a majority
   prefers A to B, B to C, and C to A. ⚠️ "The will of the majority"
   may not exist as a coherent object
⚠️ ARROW'S IMPOSSIBILITY THEOREM  ⚠️ a PROOF, not an empirical
   finding. No ranked voting rule over three or more options can
   simultaneously satisfy a short list of reasonable conditions
   (unrestricted domain, non-dictatorship, Pareto,
   independence of irrelevant alternatives)
   ⚠️ WHAT IT DOES NOT MEAN: it does NOT show voting is pointless
   or that all systems are equally bad. ⚠️ It shows no system is
   perfect on those axioms — which is a claim about trade-offs
⚠️ GIBBARD-SATTERTHWAITE  ⚠️ every reasonable voting system is
   manipulable in principle. ⚠️ Strategic voting cannot be
   designed away
⚠️ MEDIAN VOTER THEOREM  ⚠️ under restrictive assumptions
   (one dimension, single-peaked preferences, two competitors),
   both converge on the median. ⚠️ Real politics is
   multidimensional, so treat it as a tendency, not a law
⚠️ MCKELVEY CHAOS THEOREM  ⚠️ in multiple dimensions, agenda
   control can lead majority rule almost anywhere. ⚠️ Which
   makes §2's second face of power a formal result
```

---

## §8. ⚠️ Voting Systems

**⚠️ There is no neutral voting system. Every rule embeds a judgement about what
representation means.**
```
⚠️ FPTP / plurality  ⚠️ simple, produces single-party majorities,
   strong local link. ⚠️ Disproportionate; wasted votes; rewards
   geographic concentration; ⚠️ can elect a legislature whose
   majority won a minority of votes
⚠️ TWO-ROUND  majority for the winner; ⚠️ costly, and can produce
   perverse first-round eliminations
⚠️ RANKED CHOICE / IRV / AV  ⚠️ eliminates the spoiler problem
   partially; ⚠️ NOT monotonic in all cases (⚠️ ranking a candidate
   HIGHER can in principle hurt them — a real theoretical defect)
⚠️ LIST PR  proportional, ⚠️ coalition government the norm,
   thresholds exclude small parties; ⚠️ weaker constituency link
⚠️ MMP  ⚠️ combines local members with a proportional correction
STV  proportional with ranked ballots in multi-member seats
APPROVAL and SCORE  ⚠️ escape Arrow's framing by not being
   ranked systems — which is why advocates favour them, and
   they face Gibbard-Satterthwaite regardless
```
**⚠️ DUVERGER'S LAW is among the more robust findings** (§1 → `polisci-what-the-field-establishes-power-the-state-and-theory`): ⚠️ **plurality single-member
districts TEND toward two-party competition, through the mechanical effect (seats punish
small parties) and the psychological effect (voters abandon them).** **⚠️ Stated as a
tendency, not a law — India and Canada are standing qualifications.**
**⚠️ Malapportionment and gerrymandering** — ⚠️ **and note that the requirement of
proportionality, compactness, competitiveness, and respect for communities of interest
CANNOT all be satisfied simultaneously, which is why redistricting is genuinely hard and
not merely corrupt.**

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# PART III — INSTITUTIONS