リチャード・セイラー（Richard H. Thaler、1945–） 経済学者。シカゴ大学ブース・スクール・オブ・ビジネス教授（名誉教授）。専門は行動経済学で、人間の心理や認知バイアスを経済学に取り入れ、伝統的な合理的意思決定モデルを発展させた研究で知られる。2017年にノーベル経済学賞を受賞した。代表作『実践 行動経済学』（原題: "Nudge: Improving Decisions About Health, Wealth, and Happiness"）は、キャス・サンスティーンとの共著で、人々の自由な選択を尊重しながら望ましい行動を促す「ナッジ」の考え方を広めた一冊である。
Richard H. Thaler (born 1945) is an American economist and Professor Emeritus at the University of Chicago Booth School of Business. A pioneer of behavioral economics, he is known for integrating insights from psychology into economics to explain how people actually make decisions. His contributions to behavioral economics earned him the 2017 Nobel Prize in Economic Sciences. His best-known book, "Nudge: Improving Decisions About Health, Wealth, and Happiness," co-authored with Cass R. Sunstein, introduced the influential concept of "nudging"—designing choice environments that encourage better decisions while preserving individual freedom of choice.
