Marron glacé that a "marron glacé" is a confit marron that is covered in caramel. The 1767 book "L'agronome, ou dictionnaire portatif du cultivateur" claimed that the best marrons came from the Dauphiné region in southeastern France, and contained instructions for preparing marron glacés. Chestnuts are covered with a membrane, known as a pellicle or episperm, which closely adheres to the fruit's flesh and must be removed because of its astringency. Marron nuts have a pellicle which is "superficially attached to the nut", making it easily removable from the fruit. Some chestnuts have two cotyledons usually separated with deep grooves penetrating nearly
Donald Marron division. In 1969 Marron co-founded Data Resources Inc. with Harvard University notable economist Otto Eckstein. DRI became the largest non-governmental source of economic data and, working with Eckstein's theory of core inflation, developed the largest macroecomonic model of its era. Data Resources is credited with "breaking new ground for the practical use of economics" among business executives and others. The company went public in 1976, with 52 of the nation's 100 largest industrial corporations as clients. The company was sold to McGraw-Hill in 1979 for $103 million. PaineWebber Group was one of the nation's leading full-service investment firms, serving its