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There are some parameters of economic analysis in specialized papers that barely have incorporated the importance of the economic activity expansion over the geographical scale, no matter in medium, largest or metropolitan cities. We present evidence and hypothesis on the urban nature of economic expansion that might be able to combine the use of concentric and polycentric structure in a city with a population over 300 thousands people. The paper is developed in two main aspects of economic expansion: 1) the nature of the employment that consolidates and structures the labor market; and 2) the organization of intraurban space that is stimulated by those activities. [ABSTRACT FROM AUTHOR]

This work examines the relationship between urban water management and the culture of water, assuming that there is a contradiction between these two aspects. It focuses on drinking-water service in Nuevo Laredo. The methodology employed in this study includes a look at drinking-water management indicators, a review of the literature on water culture, and interviews with local stakeholders about the population's awareness concerning water conservation. The paper f inds that inef f icient water management practices contradict policy objectives involving the culture of water. [ABSTRACT FROM AUTHOR]

Transport infrastructure influences the location of manufacturing firms in that sense, this paper compares the influence of accessibility to ports for export and the location of manufacturing firms in two municipalities in the northern Mexico border. The tools used include the management of a geographic information system and micro-level data of the industrial parks of each municipality. Statistical analysis was based on the application of Poisson models to estimate the sets placement options. The results show that accessibility and market size have greater significance in the location of firms in both cities. [ABSTRACT FROM AUTHOR]