He is widely considered to be one of the leading experts on the psychology of nostalgia. He has published dozens of papers and is currently writing a book on this topic. His work has been featured by many news and media outlets such as the New York Times, New Yorker, Telegraph, Guardian, ABC News, CNN, MSNBC, BBC Radio, CBC Radio, Men’s Health, Women’s Health, Cosmopolitan, Science Friday, and Good Housekeeping.