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21.
The increasing amount of data and video traffic carried by mobile networks has recently risen the demand for enhanced network capacity, more efficient use and more effective management of spectrum. Cognitive radio technologies candidate to respond to these urgent needs by allowing a near simultaneous band sharing. The regulation plays a crucial role in promoting the adoption of these technologies, in order to overcome the traditional paradigms of authorizations for exclusive spectrum usage. The article outlines spectrum management regimes where the implementation of frequency sharing technologies, including cognitive technologies, is foreseeable and brings them back to a comprehensive taxonomy of dynamic spectrum access and sharing models, in the effort to reconcile partially diverging approaches and nomenclatures suggested in literature. Theoretic analysis is supported by a number of illustrations and practical experiments with shared spectrum usage. Based on suggested taxonomy, the research aims at showing the evolutionary path toward the introduction and spreading of cognitive and other spectrum sharing technologies, pointing out relevant trends and instruments made available by the reform of EU Telecom Package, as well as at outlining the status of regulation, policy and standardization in Europe. 相似文献
22.
Mauro Fasiani 《Journal of Economics》1932,3(5):651-691
Ohne ZusammenfassungDie erste aus einer Serie von Prof. M. Fasiani's Abhandlungen über die reine Theorie der Finanzwissenschaft in Italien, die in den folgenden Nummern der Zeitschrift erscheinen werden. (Anm. d. Schriftleitung.)
Die Arbeit wird fortgesetzt (Übersetzt von P. N. Rosenstein-Rodan, Wien) 相似文献
23.
Mauro Fasiani 《Journal of Economics》1933,4(3):357-388
Ohne ZusammenfassungVgl. Heft 5, Bd. III und Heft 1, Bd. IV der Zeitschrift (Anm. d. Schriftleitung).Aus dem Italienischen übersetzt von Hans Fried, Wien. 相似文献
24.
Mauro Maria Baldi Teodor Gabriel Crainic Guido Perboli Roberto Tadei 《Transportation Research Part E: Logistics and Transportation Review》2012,48(6):1205-1220
In the Generalized Bin Packing Problem (GBPP), given two sets of compulsory and non-compulsory items characterized by volume and profit and a set of bins with given volume and cost, we want to select the subset of profitable non-compulsory items to be loaded together with the compulsory ones into the appropriate bins in order to minimize the total net cost. Lower and upper bounds to the GBPP are given. The results of extensive computational experiments show that the proposed procedures are efficient and the bounds are tight. 相似文献
25.
Mauro Caminati 《Metroeconomica》2021,72(1):57-81
A Cournot collaboration game is complemented with the hypothesis that the cost of R&D collaboration depends on firm’s directed knowledge distance with respect to potential R&D partners. The further hypothesis that directed distance may be non‐uniform and pair‐wise asymmetric reconciles theoretical predictions with qualitative evidence about concentration and multiplicity of components in industrial R&D networks. The welfare properties of sparse stable networks are also affected. 相似文献
26.
This paper analyses the relationship between markups and international trade at the firm level using a large sample of French manufacturing firms for the period 1995–2007. In particular, the paper investigates the effect of increasing import competition from China on firms' price–cost margins and the way in which exporting interacts with this effect. The results show robust evidence that firms in more direct competition with Chinese imports decrease their markups. However, firms that become exporters experience a smaller reduction in their price–cost margins. Consistent with these findings, the results also show that firms facing tougher competition from China are more likely to start exporting to avoid such competitive pressures. 相似文献
27.
Erik Lindahl's approach to macroeconomics focused on the non-neutralityof monetary policy (in the short and the long run) and on thedenial of the existence of natural rates of interest and unemployment.From the 1920s until his death in 1960, Lindahl advocated theuse of norms for monetary policy to fight inflation and deflationprecisely because he would not rely on the market system's returnto natural rates. Making use of hitherto unexplored material,this paper analyses the development of Lindahl's thinking aboutprice level changes, investment and employment from the 1920sto the 1950s. 相似文献
28.
Mauro Guillen 《董事会》2007,(4):102-103
中国的全面经济改革,在短短四分之一世纪的时间内,就为中国赢得了在全球经济圈中举足轻重的地位;相对于其他国家而言,在中国的经济改革中,公司从国有化向私有化转变的这一过程更加平稳。与此同时,一个充满活力的富于 相似文献
29.
Export-oriented FDI in the UK 总被引:1,自引:0,他引:1
It is well known that the performance of foreign firms comparedto domestic companies is superior with respect to employment,wages, and productivity. In this paper we detail the exportbehaviour of foreign affiliates in the United Kingdom relativeto indigenous firms. Our findings show that foreign firms aremore likely to export, and when they do so they are more exportintensive and overall contribute disproportionately to totalmanufacturing exports from the UK. While firm-level advantagesexplain some of these differences in export behaviour, strategicconsiderations dominate, where these include the differentialin costs, productivity, and market size between the UK and foreigncountries. That is, both horizontal and vertical motives canbe found for the use of the UK as an export platform by foreignfirms. 相似文献
30.
Mauro Cerè 《Decisions in Economics and Finance》1982,5(2):151-158
Viene considerato il problema della determinazione della «politica ottima» di un'impresa che deve ammortizzare un prestito diviso in obbligazioni, noti i tassi di interesse del prestito, la redditività del capitale disponibile e prefissati vincoli sul numero massimo di obbligazioni da rimborsare nei singoli anni. Il problema viene risolto coi metodi della programmazione lineare. 相似文献