نتایج جستجو برای: mena jel classification r12
تعداد نتایج: 504934 فیلتر نتایج به سال:
UNLABELLED Fibronectin (FN) is a major component of the tumor microenvironment, but its role in promoting metastasis is incompletely understood. Here, we show that FN gradients elicit directional movement of breast cancer cells, in vitro and in vivo Haptotaxis on FN gradients requires direct interaction between α5β1 integrin and MENA, an actin regulator, and involves increases in focal complex ...
This paper analyses the role of product differentiation in firms’ choices between exporting and foreign direct investment as ways to supply overseas markets. When the degree of product differentiation is exogenously fixed, we show that the overseas firm favors exporting at low and high degrees of product differentiation while local production is favored at intermediate values: there can be a “d...
Transport infrastructure has represented one of the cornerstones of development and cohesion strategies in the European Union (EU) and elsewhere in the world. However, despite the considerable funds devoted to it, its impact remains controversial. This paper revisits the question of to what extent transport infrastructure endowment – proxied by regional motorways – has contributed to regional g...
In a mean-variance state investment managers must thoroughly specify portfolio risk to obtain full diversification and select investment options on the efficient frontier. However, diversification within real estate is not as costless as other financial assets such as stocks or bonds. The local nature of real estate implies that investment managers may need to specialize for simplicity or by po...
There exists significant price dispersion in many industries. As a consequence the value of output is not necessarily a good measure of the quantity of output. Estimation of production functions for these types of goods is thus challenging since quantities and prices of output are typically not separately observed by the econometrician. This paper provides a new flexible approach for estimating...
Local outputs for nationally available brands of packaged goods tend to be spatially concentrated, i.e., the same brand has high outputs in some regions, and low outputs in others. Curiously, such spatial concentration is very persistent despite direct competition between brands and a notable lack of product differentiation. It is shown that the stability of spatial concentration can be explain...
We consider the problem of integrating spatial amenities into locational equilibrium models with multiple jurisdictions. We provide sufficient conditions under which models that assume a single housing price in each community continue to apply in the presence of location-specific amenities that vary both within and across communities. If these conditions are satisfied, the models, estimation me...
The taxonomic positions of two gamma- and UV-ray-resistant strains isolated from radiation-polluted soil in north-west China were determined in a polyphasic study. The organisms, designated R12(T) and R13(T), were Gram-stain-positive, non-spore-forming cocci, which contained MK-8 as the major respiratory quinone and C(16 : 1)omega7c and C(16 : 0) as major fatty acids. The cell walls of strains ...
The present paper thoroughly explores second-best efficient allocations in an adverse selection insurance economy. We start from a natural extension of the classical model, assuming less than perfect risk perceptions. We propose first and second welfare theorems, by means of which we describe efficiencyenhancing policies. Notions of weak and strong adverse selection are promising for interpreti...
This paper proposes a possible framework for identifying excessive investment. Based on this method, it finds evidence that some types of investment are becoming excessive in China, particularly in inland provinces. In these regions, private consumption has on average become more dependent on investment (rather than vice versa) and the impact is relatively short-lived, necessitating ever higher...
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