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191.
192.
A regime-switching vector error correction model is applied to monthly price data to assess the impact of Bovine Spongiform Encephalopathy (BSE) outbreaks on price relationships and patterns of transmission among farm and retail markets for bovines in Spain. To evaluate the degree to which price transmission is affected by BSE food scares, a BSE food scare index is developed and used to determine regime switching. Results suggest that BSE scares affect beef producers and retailers differently. Consumer prices are found to be weakly exogenous and not found to react to BSE scares, while producer prices are conversely adjusted. The magnitude of the adjustment is found to depend on the magnitude of the BSE scare. 相似文献
193.
194.
The seasonal structure of quarterly UK and Japanese consumption and income is examined by means of fractionally based tests proposed by Robinson ( 1994 ). These series were analysed from an autoregressive unit root viewpoint by Hylleberg, Engle, Granger and Yoo (HEGY, 1990 ) and Hylleberg, Engle, Granger and Lee (HEGL, 1993 ). We find that seasonal fractional integration, with amplitudes possibly varying across frequencies, is an alternative plausible way of modelling these series. Copyright © 2001 John Wiley & Sons, Ltd. 相似文献
195.
Explaining how individuals form their risks and benefit perceptions with regard to new technologies is a key issue in order to understand how new information disseminates. This paper examines the effect of knowledge, social values and trust in experts as shaping perceptions of risks and benefits of new technologies. Given that individual's perceptions of a technology is affected by unobserved heterogeneity, we use a methodology to disentangle the effect of a joint estimation of risks and benefit perceptions, namely seemingly unrelated probit, and we draw upon evidence from a representative survey carried out in Spain. Our findings suggest that factual knowledge and trust in experts increase perceptions of benefit of new technology developments and jointly reduce the perceptions of risk. Furthermore, reliance on traditional social values only appears to affect perceptions of benefits but does not influence risk perceptions. 相似文献
196.
A review of literature on applications of Granger causality to problems in international agricultural economics research is summarized. The review relates to cointegration theory, and it identifies the areas where recent econometric developments may be of value. Testing procedures are outlined, and a discussion is provided on questions such as non-stationarity and asymptotic distribution of non-causality tests, the relationship between cointegration and causation, the relative merits of various testing procedures, and concerns about testing bivariate causality in higher dimensional models. Finally, a recent econometric development is discussed and its future use in applied research is discussed. 相似文献
197.
Juan Cabas Monje Bouali Guesmi Amer Ait Sidhoum José María Gil 《The Australian journal of agricultural and resource economics》2023,67(4):688-703
The pig meat production plays a significant role in the Spanish agrofood system. The assessment of the efficiency performance with which farmers are operating is necessary to define adequate policy and management strategies. In this context, this study aimed to determine the technical efficiency (TE) performance of pig farms and to examine the key factors that may affect the production system in Spain. To do so, the analysis relies on the quantile stochastic frontier model using a sample of Spanish pig farms. Results show a significant difference between production frontier parameters across the selected quantiles, which support the relevance of using the quantile regression approach. The optimal quantile for the stochastic frontier indicates an average TE level of 75%. In addition, empirical findings suggest that pig farmers in Spain give more importance to the adoption of high technology to improve their economic and technical performance as well as their competitiveness at the European pig market. 相似文献
198.
199.
Gil Avnimelech 《Technology Analysis & Strategic Management》2013,25(7):835-851
This paper analyses the development of biotechnology clusters in North Carolina (NC) and Israel. In both NC and Israel, when the biotechnology was identified as a potential strategic priority, the framework conditions were suitable for successful policy-targeting. NC presents a case of a successful transition from a traditional manufacturing economy to a knowledge economy. The most successful part of this transition was a policy-led development of a biotechnology cluster in the Research Triangle. While Israel also presents a case of a successful transition from a low-tech economy to a knowledge-intensive economy, Israel failed to develop a successful biotechnology cluster. We suggest that this failure is mostly due to a failure to implement policy to encourage such development. We argue that the elements, which separate NC's success from Israel's failure, are: a clear vision and strategic planning; timely response, long-term commitment; strong leadership; cooperation between the government, private sector and academia, and an adjustable policy-making process. 相似文献
200.
María José Gil Moltó Nikolaos Georgantzís Vicente Orts 《Journal of Economics & Management Strategy》2005,14(2):461-476
We study a nontournament R&D duopoly. Before the standard R&D investment and quantity-setting stages, we consider a stage in which firms choose their R&D technologies. Spillovers negatively depend on R&D technology differentiation. We show that, in equilibrium, firms will choose identical or very similar R&D processes. Such equilibria may entail less differentiation than would be dictated by social welfare maximization. 相似文献