98109driveroai:ddd.uab.cat:98109hdl_2072_13171oai:www.recercat.cat:2072/179210eng33332González Val, RafaelGrowth in a Cross-Section of Cities : Location, Increasing Returns or Random Growth?Xarxa de Referència en Economia Aplicada (XREAP)201147 p.9; 264. Despite this, income growth is mostly explained by social and locational fundamentals. Population growth also exhibits two distinct equilibria determined by a threshold value of 116,300 inhabitants beyond which city population grows at a higher rate. Income and population growth do not go hand in hand, implying an optimal level of population beyond which income growth stagnates or deterioratesThis article analyzes empirically the main existing theories on income and population city growth: increasing returns to scale, locational fundamentals and random growth. To do this we implement a threshold nonlinearity test that extends standard linear growth regression models to a dataset on urban, climatological and macroeconomic variables on 1,175 U.S. cities. Our analysis reveals the existence of increasing returns when per-capita income levels are beyondinfo:eu-repo/semantics/openAccessL'accés als continguts d'aquest document queda condicionat a l'acceptació de les condicions d'ús establertes per la següent llicència Creative Commons: http://creativecommons.org/licenses/by/3.0/es/EconomyEconomic developmentCities and townsEconomiaDesenvolupament econòmicCiutatsinfo:eu-repo/semantics/workingPaperOlmo, JoseXarxa de Referència en Economia Aplicada (XREAP)XREAP ;2011-2147311795http://ddd.uab.cat/pub/estudis/2011/hdl_2072_179210/XREAP2011-21.pdfAdreça alternativahttp://hdl.handle.net/2072/179210ESTUDISUABfile0MD58753e0772db9ae733f098a1a001c4919311795bytestream1.6filepathpub/estudis/2011/hdl_2072_179210/XREAP2011-21.pdfdisk