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排序方式: 共有139条查询结果,搜索用时 109 毫秒
81.
Fabio 《European Management Journal》2002,20(6)
Are firms competing in a new world of frictionless e-commerce or is the Internet a pricer’s paradise? It is not safe, at the moment, to say that the Internet is lowering online prices, decreasing price dispersion and increasing online customer price sensitivity.The strategic issue for firms pricing on the Net is avoiding the ‘commodity trap’ and taking advantage of the ‘other side’ of information transparency. Firms should increasingly rely on finer segmentation of their customers and resort to dynamic and smart pricing, product and price versioning and bundling. Multichannel and customer lifetime value pricing will become strategic issues. 相似文献
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In some fields, we are forced to work with missing data in multivariate time series. Unfortunately, the data analysis in this context cannot be carried out in the same way as in the case of complete data. To deal with this problem, a Bayesian analysis of multivariate threshold autoregressive models with exogenous inputs and missing data is carried out. In this paper, Markov chain Monte Carlo methods are used to obtain samples from the involved posterior distributions, including threshold values and missing data. In order to identify autoregressive orders, we adapt the Bayesian variable selection method in this class of multivariate process. The number of regimes is estimated using marginal likelihood or product parameter-space strategies. 相似文献
85.
Patrick Borges Marcelo Bourguignon Fabio Fajardo Molinares 《Australian & New Zealand Journal of Statistics》2017,59(1):137-150
In this paper we propose a new stationary first‐order non‐negative integer valued autoregressive process with geometric marginals based on a generalised version of the negative binomial thinning operator. In this manner we obtain another process that we refer to as a generalised stationary integer‐valued autoregressive process of the first order with geometric marginals. This new process will enable one to tackle the problem of overdispersion inherent in the analysis of integer‐valued time series data, and contains the new geometric process as a particular case. In addition various properties of the new process, such as conditional distribution, autocorrelation structure and innovation structure, are derived. We discuss conditional maximum likelihood estimation of the model parameters. We evaluate the performance of the conditional maximum likelihood estimators by a Monte Carlo study. The proposed process is fitted to time series of number of weekly sales (economics) and weekly number of syphilis cases (medicine) illustrating its capabilities in challenging cases of highly overdispersed count data. 相似文献
86.
The concentration of high-frequency controls in a limited period of time (“crackdowns”) constitutes an important feature of many law-enforcement policies around the world. In this paper, we offer a comprehensive investigation on the relative efficiency and effectiveness of various crackdown policies using a lab-in-the-field experiment with real passengers of a public transport service. We introduce a novel game, the daily public transportation game, where subjects have to decide, over many periods, whether to buy or not a ticket knowing that there might be a control. Our results show that (a) concentrated crackdowns are less effective and efficient than random controls; (b) prolonged crackdowns reduce fare-dodging during the period of intense monitoring but induce a burst of fraud as soon as they are withdrawn; (c) pre-announced controls induce more fraud in the periods without control. Overall, we also observe that real fare-dodgers fraud more in the experiment than non-fare-dodgers. 相似文献
87.
Alberto Alesina Silvia Ardagna Giuseppe Nicoletti Fabio Schiantarelli 《Journal of the European Economic Association》2005,3(4):791-825
We use newly assembled data on regulation in several sectors of many OECD countries to provide evidence that regulatory reform of product markets is associated with an increase in investment. A component of reform that plays a very important role is entry liberalization, but privatization also has a substantial effect on investment. Sensitivity analysis suggests that our results are robust. (JEL: E22, L5) 相似文献
88.
The paper presents the development of a cutting tool guide, specifically for the harvest of bamboo. The development was made based on precepts of eco-design and ergonomics, for prioritizing the physical health of the operator and the maintenance of the environment, as well as meet specific requirements of bamboo. The main goal is to spread the use of bamboo as construction material, handicrafts, among others, from a handy, easy assembly and material available tool. 相似文献
89.
Fabio Luis Barbosa dos Santos 《Globalizations》2019,16(2):216-231
ABSTRACTThis article critically assesses Brazil’s role in the South American regional integration process. My hypothesis is that despite the rhetoric of Brazil’s Workers’ Party (PT) governments about a ‘new developmentalism’ project to support ‘post-neoliberal’ regional integration, the structural continuities imposed by neoliberal macroeconomic policies have constrained all possibilities of overcoming underdevelopment. In the realm of regional integration, the driving force has been the internationalization of oligopolic Brazilian business in a process that promised Brazil a leadership role in the subcontinent. This frame has fostered business based on the overexploitation of labour and the destruction of the environment, enforcing trends that deepen the structures of economic dependency and social conflict. The political outcome of that process is that the PT has contributed to contain social pressures, both in the domestic and in regional contexts, as Brazil has played a moderating role in South America’s so-called progressive wave. 相似文献
90.
Agency Problems and Airport Security: Quantitative and Qualitative Evidence on the Impact of Security Training
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Martina de Gramatica Fabio Massacci Woohyun Shim Uğur Turhan Julian Williams 《Risk analysis》2017,37(2):372-395
We analyze the issue of agency costs in aviation security by combining results from a quantitative economic model with a qualitative study based on semi‐structured interviews. Our model extends previous principal‐agent models by combining the traditional fixed and varying monetary responses to physical and cognitive effort with nonmonetary welfare and potentially transferable value of employees' own human capital. To provide empirical evidence for the tradeoffs identified in the quantitative model, we have undertaken an extensive interview process with regulators, airport managers, security personnel, and those tasked with training security personnel from an airport operating in a relatively high‐risk state, Turkey. Our results indicate that the effectiveness of additional training depends on the mix of “transferable skills” and “emotional” buy‐in of the security agents. Principals need to identify on which side of a critical tipping point their agents are to ensure that additional training, with attached expectations of the burden of work, aligns the incentives of employees with the principals' own objectives. 相似文献