Derman, Emanuel: - Emanuel Derman is the author of My Life as a Quant, the 2004 memoir that first introduced the quant world to a wide audience. He is also the author of Models.Behaving.Badly, a meditation on the critical difference between models in the physical sciences and those in the social sciences. He is a frequent contributor to X/twitter at @EmanuelDerman. Brief Hours and Weeks is a memoir of childhood and youth in Cape Town. The author likes the remark by Sheila Heti: "The self's report on itself is surely a great fiction." Derman was born in South Africa but has spent most of his professional years in Manhattan in New York City, where he made contributions to several fields. He started out as a theoretical physicist, doing research on unified theories of elementary particle interactions. At AT&T Bell Laboratories in the 1980s he developed programming languages for business modeling. From 1985 to 2002 he worked on Wall Street, running quantitative strategies research groups in fixed income, equities, and risk management at Goldman Sachs, where he was appointed a managing director in 1997. The two financial models he developed with colleagues there, the Black-Derman-Toy interest rate model and the local volatility model, have become widely used industry standards. From 2003 to 2023 he was head of the Master's Program in Financial Engineering at Columbia, where he is now Professor of Professional Practice Emeritus. In both of his books Derman points out the dangers that inevitably accompany the use of models, which are merely limited metaphors that compare something you would like to understand with something similar, but not identical, that you already understand. He was named the IAFE Financial Engineer of the Year in 2000. He has a PhD in theoretical physics from Columbia University and is the author of numerous articles in elementary particle physics, computer science, and finance.