Mary Childs

Mary Childs appears in Do prediction market bettors make anything better? as the Planet Money host who joins Bobby Allen in testing Kalshi by betting on whether Donald Trump would say specific words in a speech about Iran.

Her role is to make the user-experience critique concrete. The episode says Mary lost a five-dollar bet on the word “tariff,” and the experiment helped shift the discussion from abstract [[PredictionMarketPublicGoodClaim|public-good claims]] to the gambling-like feeling of rapid event markets, loss-chasing, and attention narrowed to settlement triggers.

Connections

• Bobby Allen - reporting partner in the app test.
• Kalshi - platform tested in the episode.
• Prediction Market Ethics, Prediction Market Legal Boundary, and Event Contract Manipulation Risk - concepts grounded by the speech-betting example.