10.7910/DVN/CTZ74Q Van Coppenolle, Brenda Brenda Van Coppenolle CEVIPOF RIEGGER, SOFIJA SOFIJA RIEGGER https://orcid.org/0009-0001-3904-6239 Universitat Pompeu Fabra Jessica De Rongé Jessica De Rongé CEVIPOF Harvard Dataverse 2026 Social Sciences Enter your name here: LastName, FirstName FirstName Enter your name here: LastName Van Coppenolle, Brenda Brenda Van Coppenolle CEVIPOF 2026-01-07 2026-04-27 498 60872488 49232 459660 746 text/plain text/tab-separated-values text/x-stata-syntax application/octet-stream text/plain 1.0 Creative Commons CC0 1.0 Universal Public Domain Dedication. How do political lotteries affect choices and outcomes? We study the monthly lotteries used to assign all legislators to deliberation committees in 19th century Belgium. We focus on the period of democratization around the entry of a new, third, and Socialist party. We ask whether random, more extensive exposure to certain MP types affected voting over all roll-call votes between 1892 and 1902, i.e. debating more Socialists, more incumbents, or more of those from majority Flemish-speaking districts. We find small but significant exposure effects on rebelling against the party majority, against the deliberative ideal but along government-opposition logic. Legislatures may similarly limit lottery’s potential today.