Using ecological metaphors to describe business structure and operations is increasingly common especially within the field of information technology (IT). For example, J. Bradford DeLong, a professor of economics at the University of California, Berkeley, has written that "business ecosystems" describe “the pattern of launching new technologies that has emerged from Silicon Valley”.[5][6] He defines business ecology as “a more productive set of processes for developing and commercializing new technologies” that is characterized by the “rapid prototyping, short product-development cycles, early test marketing, options-based compensation, venture funding, early corporate independence”.[7] DeLong also has expressed that the new way is likely to endure “because it's a better business ecology than the legendarily lugubrious model refined at Xerox Parc—a more productive set of processes for rapidly developing and commercializing new technologies”.[8]