# Voter Turnout **Voter turnout** is the share of eligible citizens who actually cast a ballot — the most basic measure of mass participation and a perennial battleground because *who turns out* often decides *who wins*. It sits at the intersection of [[Political Behavior]] and the [[Voter Suppression]] / voting-rights material in the vault. ## The paradox of voting Rational-choice theory poses a famous puzzle: because the probability that any single vote decides an election is vanishingly small, a narrowly self-interested actor "should" abstain — yet tens of millions vote. The Riker–Ordeshook **calculus of voting** resolves it by adding a **civic-duty / expressive** term (the *D* in their equation): people vote because participation is intrinsically meaningful and identity-affirming, not because they expect to be decisive. This is why turnout responds so strongly to **mobilization** and **affect** — being asked to vote, and feeling that the stakes are existential, matter more than instrumental calculation. ## What drives turnout - **Costs and institutions.** Registration rules, ID requirements, polling-place access, early/mail voting, and weekday elections all raise or lower the cost of participating — the terrain of the [[Voter Suppression]] debate. - **Mobilization.** Direct contact by campaigns, parties, churches, and unions reliably boosts turnout; the ground game is real. - **Salience and affect.** High-stakes, high-conflict elections turn people out; [[Negative Partisanship]] has pushed US presidential turnout to historic highs as voters mobilize against the feared other side. - **Resources and habit.** Education, income, age, and prior voting strongly predict participation — turnout is habit-forming, and first-time voting is the hard step. ## The demographic skew Turnout is **not** a random sample of the eligible public: older, wealthier, more-educated, and (historically) whiter citizens vote at higher rates. The US also turns out a comparatively **low** share of its eligible population relative to peer democracies, partly because it uniquely places the registration burden on the individual. Because the electorate is unrepresentative of the citizenry, *changes* in turnout — who is mobilized or demobilized — are a lever over outcomes, which is precisely why turnout is contested terrain rather than a neutral civic metric. ## KB Significance Turnout is where mass behavior meets election rules and power. The KB's two relevant threads converge here: the **behavioral** account (why [[Negative Partisanship]] now drives record participation) and the **institutional** account (how registration, ID, and access rules in the [[Voter Suppression]] material reshape the electorate). Whether a party's strategy is to *expand* or *shrink* the electorate is one of the cleanest tells of how it expects to win. ## See Also - [[Voting Behavior]] — the choice side of participation. - [[Negative Partisanship]] — the modern turnout engine. - [[Voter Suppression]] · [[Political Behavior]]