from WIkipedia entry YIMBY:
YIMBY is an acronym for Yes In My Back Yard, a pro-development movement in contrast and opposition to the NIMBY ("Not in My Back Yard") phenomenon. Typically the YIMBY movement supports development of new housing in cities where rental costs have escalated to unaffordable levels, though it may also support public-interest projects such as the installation of clean energy sources like wind turbines. In the United States, early leaders of the YIMBY movement include Sonja Trauss in San Francisco and Nikolai Fedak in New York. The first ever Yes In My Backyard conference was held in Boulder, Colorado, in June 2016.
The Oxford English Dictionary's definition of "NIMBY":
“A person who objects to the siting of something perceived as unpleasant or hazardous in their own neighborhood, especially while raising no such objections to similar developments elsewhere.”
The earliest reference we've found to this usage of "YIMBY" is:
"Getting to YIMBY: Yes in My Backyard." by Elizabeth Kiser, World Wastes 35, no. 12 (December 1992): 38-41.
"Why Are There NIMBYs?" by eminent US land-use/zoning scholar William Fischel, 2000, provides a useful analysis of the NIMBY phenomenon from an economic perspective. https://www.dartmouth.edu/~wfischel/Papers/00-04.PDF
"The Social Functions of #NIMBYism" by Matthew J. Kiefer, in Harvard Graduate School of Design Magazine, 2008: a nuanced, relatively sympathetic examination of NIMBYism. Republished by Planetizen.
"City Unplanning" by David Schleicher provides a thorough review of US zoning's legal underpinnings, the economic dynamics produced, and some ways to counteract indesirable outcomes.. PDF: http://www.yalelawjournal.org/pdf/1162_m41e7ifa.pdf
An excellent 2016 study by Centre for London examined people's reasons for resisting new housing development:
"STOPPED: Why People Oppose New Residential Developments in Their Back Yard." by Nicolas Bosetti, Sam Sims, 20 July 2016. ISBN: 978‑0‑9932416‑7‑3
See also: CAVE People ("Citizens Against Virtually Everything).