Clustering techniques have been used by many intelligent software agents in order to retrieve lter and categorize documents available on the World Wide Web Clustering is also useful in extracting salient features of related web documents to automatically formulate queries and search for other similar documents on the Web Traditional clustering algorithms either use a priori knowledge of documen...

Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works, must be obtained from the IEEE. Abstract We present an automatic method for the classii-cation of steel ...

Despite wide recognition of their significant role in explaining sustained growth and economic development, uncompensated knowledge spillovers have not yet been fully modeled with a microeconomic foundation. The main purpose of this paper is to illustrate the exchange of knowledge as well as its consequences on agglomerative activity in a general-equilibrium search-theoretic framework. Agents, ...

We investigate how differences in set-up costs of various types affect the trade-off between global efficiency and spatial equity and show that the standard assumption of symmetry in fixed costs masks the existence of an interesting effect: the range of available varieties varies depends on the spatial distribution of firms. In such a setting, even when the market outcome leads to excessive agg...

This paper focuses on the questions to what extent agglomeration effects and localized inter-organizational linkages influence different types of innovative performance of firms. Doing so adds to the relatively scarce firm-level literature regarding the role of regional environment for the innovative performance of firms by disentangling the often conflated effects of agglomeration effects and ...

We analyze endogenous pattern formation resulting from forward-looking optimizing behavior of economic agents in the presence of spatial spillovers modelled by continuous kernels. We use Fourier methods to identify necessary and sufficient conditions for the emergence of optimal agglomeration through an optimal spillover induced instability of a spatially homogeneous steady state. We apply our ...

Many sources of urban agglomeration involve departures from the first-best world. The benefit evaluation of a transportation project must then take into account agglomeration benefits along with any direct user benefits. Using a monopolistic competition model of differentiated intermediate products, we show that the additional benefits can be expressed as an extended Harberger formula with vari...

We use the new economic geography perspective to explore the impacts of the Internet on the market linkages of two manufacturing and two service IT industries, and the consequential effects on their agglomeration. We study IT industry agglomeration at the county level across the entire United States during 1998-2004. The industries that we study are: computer manufacturing, semiconductors manuf...

Multinationals exhibit distinct agglomeration patterns which have transformed the global landscape of industrial production (Alfaro and Chen, 2014). Using a unique worldwide plant-level dataset that reports detailed location, ownership, and operation information for plants in over 100 countries, we construct a spatially continuous index of pairwise-industry agglomeration and investigate the pat...