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11.
Will It Spread or Not? The Effects of Social Influences and Network Topology on Innovation Diffusion
Sebastiano A. Delre Wander Jager Tammo H. A. Bijmolt Marco A. Janssen 《Journal of Product Innovation Management》2010,27(2):267-282
Innovation diffusion theory suggests that consumers differ concerning the number of contacts they have and the degree and the direction to which social influences determine their choice to adopt. To test the impacts of these factors on innovation diffusion, in particular the occurrence of hits and flops, a new agent‐based model for innovation diffusion is introduced. This model departs from existing percolation models by using more realistic agents (both individual preferences and social influence) and more realistic networks (scale free with cost constraints). Furthermore, it allows consumers to weight the links they have, and it allows links to be directional. In this way this agent‐based model tests the effect of VIPs who can have a relatively large impact on many consumers. Results indicate that markets with high social influence are more uncertain concerning the final success of the innovation and that it is more difficult for the innovation to take off. As consumers affect each other to adopt or not at the beginning of the diffusion, the new product has more difficulties to reach the critical mass that is necessary for the product to take off. In addition, results of the simulation experiments show under which conditions highly connected agents (VIPs) determine the final diffusion of the innovation. Although hubs are present in almost any network of consumers, their roles and their effects in different markets can be very different. Using a scale‐free network with a cut‐off parameter for the maximum number of connections a hub can have, the simulation results show that when hubs have limits to the maximum number of connections the innovation diffusion is severely hampered, and it becomes much more uncertain. However, it is found that the effect of VIPs on the diffusion curve is often overestimated. In fact when the influence of VIPs on the decision making of the consumers is strengthened compared with the influence of normal friends, the diffusion of the innovation is not substantially facilitated. It can be concluded that the importance of VIPs resides in their capacity to inform many consumers and not in a stronger persuasive power. 相似文献
12.
This paper analyses the financial and economic costs and benefits of the large scale National Ecological Network (NEN) nature conservation project in the Netherlands, taking into account transaction costs and land market impacts of different institutional arrangements. The net financial costs associated with achieving the current plan are equivalent with an annual amount €876 per hectare. Of the costs, transaction costs amount about 16% or €140 per hectare. The substantive land purchases involved in the plan will lead to land price increase of 20%. Nature management by agriculture turns out to be a relatively cheap option. 相似文献
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14.
Roel Nahuis Ellen H.M. Moors Ruud E.H.M. Smits 《Technological Forecasting and Social Change》2012,79(6):1121-1134
User producer interaction (UPI) increases chances for successful innovations. It is not always clear, however, what type of interaction is necessary in a particular context. This article identifies seven different types of UPI: constructing linkages, broadening, characterizing users, upstream involvement, first user enrollment, feedback, and downstream innovation. Specific contextual dimensions from which these UPI types derive relevance are discussed. The technological dimension of this context is conceptualized based on a distinction between types of technologies that differ in the degree to which they are customizable to user demands. Four case studies show that technological characteristics indeed matter for UPI, as do the heterogeneity of users and the phase of technology development. 相似文献
15.
In this paper, I study the wage a firm sets to attract highability workers (hipos) in situations where people compete fora job. I show that the more people compete, the larger a firm'sincentives to sort high and low ability workers. Moreover, workerswill signal their (high) ability in situations with many competitorsonly if a job offers a high enough wage. The main result, therefore,is that a firm sets higher wages, when more people compete. 相似文献
16.
T. P. van der Kooy J. C. P. A. van Esch F. Hartog H. Hoelen J. N. F. Bakker D. B. J. Schouten J. J. Klant J. Wemelsfelder F. de Roos A. J. W. van de Gevel J. G. Morreau H. A. J. F. Misset P. E. Venekamp J. Sandee H. den Hartog P. M. H. G. Prevoo P. J. Janssen H. Riemens A. J. Reitsma R. Kool S. Bergsma J. G. Appelboom A. R. van der Burg J. Horring J. van Klaveren P. W. Klein F. van Heek E. Zahn 《De Economist》1967,115(1):75-129
17.
A. Janssen 《Statistica Neerlandica》1989,43(2):109-125
For randomly right censored models we study the asymptotic behaviour of linear (rank) statistics under local alternatives. The results can be used to evaluate the asymptotic power of the corresponding tests. For instance we treat the question how to choose the best scores in order to derive asymptotically optimal (rank) tests under certain alternatives. 相似文献
18.
When Does an Inflation Target Yield the Second Best? 总被引:1,自引:0,他引:1
It is shown that an inflation target does not establish the second best if the central bank is independent and the government collects seigniorage revenues. To eliminate excessive inflation and ensure that stabilization is efficient, society should combine an optimal inflation target with a central bank that attaches less weight to inflation stabilization than the public does. 相似文献
19.
D. B. J. Schouten H. J. Hofstra J. Wemelsfelder H. W. J. Bosman W. Griffioen J. L. Mey L. H. Janssen C. J. Oort C. J. van Eijk W. Drees Jr. Joh de Vries J. F. Michels R. A. de Widt M. P. Gans L. M. A. van den Akker E. de Vries G. L. Groeneveld H. Kuipers J. Valkhoff 《De Economist》1961,109(3-4):249-289
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