(Archived document, may contain errors) nity, once having benefitted at the expense of newcomers, pressure local officials to keep these regulations, and often to make them more stringent. This exclusionary impulse, more than, say, a laudable desire to protect the environment, is the motive be- hind such local and state regulations. Often, now construction of any kind causes existing residents to warn developers and local officials alike: "Not in my back yard!" The acronym for this expression-NIMBY-is firmly established in housing policy debate.