SimCity 3000 YIMBY Effects YIMBY (Yes In My BackYard) effects are used to calculate a building's influence on the local aura and land value. Here's a list of buildings with the radius of their influence, and the effect each has on aura: Building (radius/positive effect) Farm (4/2) Hospital (15/2) Library (15/2) Museum (20/1) Statue (15/1) Fountain (15/1) Historic Building (8/1) Park (8/2) Zoo (20/1) Marina (15/2) Stadium (20/2) City Hall (20/3) Medical Research Center(15/2) Performing Arts Center (20/3) Lighthouse (15/2) Stock Exchange (15/1) Mayor's House (10/2) Military Base (20/1) University (20/1) College (10/2) Geyser Park (20/1) - o -