Krueger served as the chair of President Barack Obama's Council of Economic Advisers from 2011 to 2013, as well as chief economist at the Department of Labor under President Bill Clinton. Krueger also made a number of contributions to the field of labor economics.
Krueger's most famous work included a paper co-authored with the economist David Card in 1993 that challenged orthodoxy around the effects of the minimum wage. Through a natural experiment comparing employment in fast food restaurants across state lines after New Jersey raised its minimum wage, the pair found that the number of jobs did not decrease, as classical economics would have assumed.
The study and subsequent book, "Myth and Measurement," helped advance a movement toward the use of empirical measurement in economics, rather than relying heavily on theory to predict the impact of policy measures.
"He believed that if you want to know the answer to something, sometimes you have to go out and get the data yourself, something very few economists do," wrote Jared Bernstein, who served as chief economist for Vice President Joe Biden, in a remembrance of Krueger on Monday.
In recent years, from his post at Princeton, Krueger published influential work on the wages of Uber drivers, the impact of opioid abuse on labor force participation, and how franchisors suppress wages by preventing franchisees from poaching workers from each other. He also published a book on the social and economic roots of terrorism, and his latest book, "Rockonomics," was a study of the economics of the music industry.
News of his death prompted an outpouring of tributes and fond memories from former colleagues and fellow economists on Twitter.
Princeton did not release details on the cause of death.
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