“Unrealistic optimism is at its most extreme in the context of marriage,” wrote Cass R. Sunstein and Richard H. Thaler in Nudge: Improving Decisions About Health, Wealth, and Happiness, their much-discussed recent manifesto about human foibles and “libertarian paternalism.”

Unrealistic optimism or no, Mr. Sunstein, who recently jumped from the University of Chicago Law School to Harvard Law School, tied the knot last week. In a ceremony in Ireland on Friday, he married Samantha Power, a Pulitzer Prize-winning writer and a professor of public policy at Harvard’s Carr Center for Human Rights Policy.

The wedding was reported by the Irish Independent and the Harvard Crimson.

The two scholars reportedly met through Sen. Barack Obama’s presidential campaign, in which both have served as advisers. Ms. Power resigned from the campaign in March after a Scottish newspaper quoted her as referring to Sen. Hillary Clinton as a “monster.” Her 2002 book, “A Problem From Hell”: America and the Age of Genocide, scrutinized American responses to mass killings in Bosnia, Rwanda, and elsewhere.

Mr. Sunstein, who has written for The Chronicle Review about political polarization and social insurance, was previously in a relationship with Martha C. Nussbaum, a professor of philosophy at the University of Chicago. —David Glenn