Podcast Atlas

Before Kalshi and Polymarket there was the Iowa Electronic Markets

source Episode summary Updated 2026-07-16 Tags: Podcast, Planet-Money, Prediction-Markets, Economics, Regulation

Summary

This Planet Money episode, built from a Throughline segment, traces prediction markets from the Iowa Electronic Markets back to older Election Betting Markets in Europe and the United States. It argues that modern platforms such as Kalshi and Polymarket are not a wholly new phenomenon; they are commercial-scale successors to older election wagering, academic market experiments, and public attempts to turn dispersed information into forecasts.

The episode’s strongest synthesis is Prediction Market History: prediction markets can aggregate information and sometimes outperform polls, but they have always lived near gambling, political signaling, hedging, media discomfort, and regulatory boundary-setting. The [[CommodityFuturesTradingCommission|CFTC]] no-action limits around the Iowa project become an early version of the same legitimacy problem later seen in Prediction Market Ethics and Prediction Market Integrity Oversight.

Key Claims

  • In 1988, Robert Forsythe and two Iowa economist colleagues created a candidate-share market after polls missed Jesse Jackson’s Michigan caucus win over Michael Dukakis.
  • The Iowa Electronic Markets let students and faculty trade shares tied to candidates, using market prices as a readout of what participants actually believed.
  • The episode says the Iowa market predicted the 1988 popular vote within roughly two-tenths of one percent and beat traditional polls 74% of the time between 1988 and 2004.
  • The [[CommodityFuturesTradingCommission|CFTC]] allowed the Iowa project under a no-action letter with small-stakes limits, no deposits above $500, no paid advertising, no profit motive, presidential-election scope, and sports excluded.
  • Coleman Strumpf and Paul Rhode found that political prediction markets were not new: election betting existed in older European settings and in U.S. elections reaching back toward the George Washington era.
  • Around the turn of the 20th century, U.S. election betting could happen through public markets such as the curb exchange outside the New York Stock Exchange.
  • Historical election betting mixed forecasting with political theater, public loyalty signaling, status display, and private hedging.
  • Strumpf concluded that older election markets were often useful at indicating both winners and the scale of victories.
  • Election markets faded partly because newspapers became more comfortable with Gallup-style scientific polling and partly because horse racing offered bettors a much higher event frequency.
  • Forsythe frames Kalshi and Polymarket as using similar basic trading and contract rules to the Iowa Electronic Markets, but at far larger commercial scale.

Key Quotes

“within two-tenths of 1%” - the episode’s description of the Iowa market’s 1988 popular-vote accuracy.

“74% of the time” - the episode’s claim about Iowa markets beating polls between 1988 and 2004.

“same kind of prediction markets” - Forsythe’s comparison between Iowa’s design and modern platforms such as Kalshi and Polymarket.

Connections

Contradictions

  • No direct contradiction found with existing wiki content.
  • The source extends the existing modern prediction-market branch backward: the wiki already treated Kalshi and Polymarket through harmful-event ethics, insider-information risk, and self-regulation; this source adds the older history of election betting, academic experimentation, and CFTC-limited legitimacy.