نتایج جستجو برای: urban growth

تعداد نتایج: 979398  

2000
John M. Quigley Robert Murray Haig

A t the risk of some simplification, it is possible to identify four periods of intense study of cities by economists. Each of these has led to an increased understanding of the economics of urban areas and the unique role played by cities in the modern economy. The first of these periods occurred in the decade after World War I—only about ten years after the truck revolutionized the transport ...

2010
Edward L. Glaeser William R. Kerr

There is a well established correlation between initial entrepreneurship and subsequent employment growth across metropolitan areas. This relationship is true when modelling entrepreneurship through average establishment size or through the prevalence of startups; the relationship also holds at the industry level within cities. These patterns are often taken as evidence that entrepreneurship pr...

2012

We find that a firm’s investment is highly sensitive to the investments of other firms headquartered nearby, even those in very different industries. It also responds to fluctuations in the cash flows and stock prices (q) of local firms outside its sector. Similar local effects are observed for anticipated investment, as measured by debt and equity offerings. These patterns do not appear to ref...

2007
Ulrich Hammel Pierre Frankhauser

The structural development of human settlements can be characterized as a complex highly feedbacketed process. The assumption that this process is governed by rather few fundamental laws stimulated a considerable research in the eld of urban growth during the last decade. Aiming at the comprehension of the basic underlying dynamics diierent approaches from the eld of self-organizing systems hav...

Journal: :مطالعات و تحقیقات اجتماعی ایران 0
حسین ایمانی جاجرمی دانشیار گروه مطالعات توسعۀ اجتماعی، دانشکدة علوم اجتماعی دانشگاه تهران

cities need good, participatory and effective policies and plans for development. urban development plans such as comprehensive plan are the most important tool for implementation of policies and plans. the effective implementation of city development plan requires high level documents such as spatial planning; good macro development plans policies, efficient urban management and public partici...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2016
Shuqing Zhao Shuguang Liu Decheng Zhou

Urbanization, a dominant global demographic trend, leads to various changes in environments (e.g., atmospheric CO2 increase, urban heat island). Cities experience global change decades ahead of other systems so that they are natural laboratories for studying responses of other nonurban biological ecosystems to future global change. However, the impacts of urbanization on vegetation growth are n...

2005
Neil Kraus

Regime theory, the dominant paradigm in the study of urban politics, maintains that cities are governed by informal arrangements consisting of public and private sector elites. Because economic growth is the main policy objective of regimes, research has tended to focus on mayoral coalition building and development policy. Thus much less attention has been paid to policies that more directly im...

2008
j. s. c. m. hoekstra

Throughout Europe, policy‐makers are developing policies to foster the spatial, economic and social development of what is, in the literature, often termed 'polycentric urban regions': a regional cluster of close‐by cities. It is assumed that taking a set of relatively small or medium‐ sized cities together opens up possibilities for regional economic growth. In this paper we put forward that t...

2004
H. S. Sudhira

Urban sprawl refers to the extent of urbanisation, which is a global phenomenon mainly driven by population growth and large scale migration. In developing countries like India, where the population is over one billion, one-sixth of the world’s population, urban sprawl is taking its toll on the natural resources at an alarming pace. Urban planners require information related to the rate of grow...

Journal: :ISPRS Int. J. Geo-Information 2016
Yongjiu Feng Miaolong Liu Lijun Chen Yu Liu

We developed a geographic cellular automata (CA) model based on partial least squares (PLS) regression (termed PLS-CA) to simulate dynamic urban growth in a geographical information systems (GIS) environment. The PLS method extends multiple linear regression models that are used to define the unique factors driving urban growth by eliminating multicollinearity among the candidate drivers. The k...

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