Measuring Concentrated Poverty in a Global Metropolis: Lessons from Los Angeles∗

The traditional definition of concentrated poverty—40 percent of a census tract population living below the federal poverty threshold—is problematic in light of burgeoning working poor populations, increasing inner-suburban poverty, and problems with the federal poverty threshold itself. This article questions the meaning of concentrated poverty as traditionally defined and measured through an analysis of social and built environments in selected Los Angeles area communities that meet the 40 percent threshold. Such neighborhoods face significant challenges, yet do not conform to stereotypes of concentrated poverty areas. Findings indicate the need for measures that recognize the increasingly heterogeneous forms and landscapes of poverty in globalizing urban regions.     

A Late Cretaceous marine long snout “pejelagarto” fish (Lepisosteidae,Lepisosteini) from Múzquiz,Coahuila, northeastern Mexico

Herreraichthys coahuilaensis gen. and sp. nov. is described based on a single specimen collected in the Santonian marls strata of the “Los Temporales” quarry, Coahuila State, northern Mexico. This new species shows the diagnostic characters of the Family Lepisosteidae and tribe Lepisosteini, together with Lepisosteus and Atractosteus. This new fish shows two rows of teeth on dentary and lacrimomaxillae bones, including a lingual row of sharp and small regular size teeth, as well as a medial row of longer and fang-like teeth; this also has a lacrimomaxillary series as the main bite element of the upper jaw and the plicidentine structure on teeth. This Mexican fish differs from the other lepisoestinis in two characters; its lacrimomaxillary series is composed of 32 bones that constitute the largest series as far known among lepisosteiformes, and its premaxilla is comparatively wider and shorter. The occurrence of this specimen into an open marine deposit with no freshwater elements suggests that Herreraichthys was a marine inhabitant; however, there is the possibility that this species was able to temporarily survive in the sea, as Atractosteus spatula does now.     

South Central Farmers and Shadow Hills Homeowners: Land Use Policy and Relational Racialization in Los Angeles∗

This article draws from the recent relational turn in geography to develop a model of relational racialization. It argues that racism functions through the legal and discursive production of linked, interdependent, and unequal places. By comparing two social movements in Los Angeles, the South Central Farmers and the Shadow Hills homeowners, I examine two spatial discourses through which race is relationally reproduced: unequal abilities to mobilize the entitlements of “property rights” and unequal claims to represent hegemonic forms of local heritage. When materialized and naturalized in land use policy, these discourses re-create racial disparities in wealth and poverty and reproduce the qualitative nature of the physical places on which racism depends.     

The Particularity of Global Places: Placemaking Practices in Los Angeles and Sydney

What makes places different from one another in the context of globalization? An analysis of 17 emblematic practices in two global cities, Los Angeles and Sydney, provides the empirical basis for answering this question. Evidence from the built environment, the social geography, and the patterns of disorder in the inner cities of these two global places shows that these cities were more alike in the late 1960s than they are today. The differentiation of the two places has increased as the effects of globalization have become more pervasive. The evidence presented in this paper suggests that there is nothing inherent in contemporary globalization that requires global cities to have inner city slums, ghettoes, massive homelessness, residential disinvestment, White flight, relict or suboptimally-utilized brownfields, illegal prostitution, a war on drugs, public spaces awash with guns, and so forth. Places are viewed here as constellations of distinctive practices configured in particular geographical settings at the intersection of specific conjunctures of historical change. Places matter in the epoch of globalization as differentially embedded, bounded particularities consisting of a mixed assortment of human practices forming causally consequential fields of effects.     

洛杉矶时装业生产网络研究

近年来,生产网络已经成为研究热点,其对纳入网络中不同企业和地方的技术升级、价值增加和获得具有重要意义。本文以洛杉矶时装业生产网络为对象,深入分析其生产网络的运行体制,吸取成功经验。研究表明,时尚区内密集的社会网络和开放的劳工市场,快速与时尚的生产理念,地理空间聚集,各公司之间竞争、合作、信任关系以及商贸促进区对区域发展的调节与治理等都是其取得成功的重要条件。     

Spatial Patterns of Immigrant Assimilation*

This research compares the contemporary areal patterning of cultural and economic assimilation with patterns expected from a model of urban spatial assimilation described by Massey and modified by us. Using 1990 census data (PUMS) for 12 immigrant groups in the greater Los Angeles area, we locate the ethnic concentrations of each group and identify two additional zones based on distance from the concentration. The zones represent varying degrees of spatial assimilation. This method allows us to compare the distribution of immigrant cohorts over time and the degree of cultural and economic assimilation of residents of the different zones. Our findings confirm most geographical aspects of the modified model. Zonal differentiation occurs in the expected direction and is statistically significant although not strong for most groups. More recently arrived immigrant groups and those with higher incomes tend to show greater differences in assimilation between zones.     

THE LOS ANGELES COAST AS A PUBLIC PLACE

ABSTRACT. In the public‐space discourse Los Angeles is usually portrayed as more “anti‐city” than city. Its landscape is overrun by houses, “private‐public” squares and plazas, theme parks, shopping malls, and so on and lacks inclusive public places. Yet this discourse has essentially disdained to contemplate a major public space that contradicts its general thesis: the Los Angeles coast. The coast is meaningful public place in two specific senses. First, it symbolizes Los Angeles as a whole and therefore provides a basis for regional public identity. Second, Angelinos themselves take the coast seriously as a public place, and they have striven to make it inclusive in practice.     

On shear-wave splitting in the Los Angeles basin

Three-component seismograms at the three USC stations, PVP, GFP and DHB, have been examined. Most earthquakes, with magnitudes ranging from 1.4 to 5.0, within a period from 1985 to 1988, show evidence of shear-wave splitting. The preferred polarization of the first split-shear wave arrivals at PVP is nearly in N-S which is consistent with both regional maximum horizontal compressive stress direction and local subsurface fault strike, showing that shear-wave splitting is caused by liquid-filled cracks or fractures associated with the N-S faulting. The polarizations of first shear wave arrivals at GFP are roughly divided into two almost perpendicular directions, ENE-WSW and NNW-SSE, which are parallel or perpendicular to the strike of the geology or topography near the station. Because GFP is near the foothills of Santa Monica Mountains, the shear-wave arrivals may be disturbed by topographic irregularities and by subsurface dipping interfaces. Two examples at DHB clearly display shear-wave splitting. Their polarizations of shear wave are in the direction of N-S, which agree with the fragmentary surface and fracturing direction there. From some relatively reliable delay times, the crack densities at three stations are given, that is, 0.025 at PVP, 0.020 at GFP and 0.045 at DGB. No systematic change of shear-wave polarization is discovered in this study.     

Modern and post-modern cities and ethnic residential segregation: Is Los Angeles different?

Dear and others associated with the ‘Los Angeles School of Urbanism’ have presented a series of challenging ideas regarding changes in urban form as a consequence of the shift from modernism to post-modernism. Some of those challenges relate to a city’s ethnic diversity and residential segregation, with Los Angeles presented as a paradigm exemplar of an emerging new urban form. This paper evaluates the arguments that Los Angeles in particular, and Californian metropolitan areas more generally, differ from metropolitan areas elsewhere in the United States in the nature of ethnic residential segregation there. Regression analyses provide little support for the argument, but graphical analyses show that although Los Angeles does not differ from the general, US-wide trends, its almost unique nature in terms of its ethnic diversity means that it clearly stands out as a place with a different pattern shared by very few others.