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排序方式: 共有216条查询结果,搜索用时 16 毫秒
41.
Regina Roessler Adam G. Drucker Riccardo Scarpa Ute Lemke Anne Valle Zárate 《Ecological Economics》2008,66(1):184-192
Livestock form key components of the livelihood strategies of many of the world's poorest people. However, despite the potential to alleviate poverty and improve food security through livestock development interventions, the lack of smallholders' participation in the planning and design of breeding programs has often been a major cause of the failure of such programs. Particularly in developing countries where livestock production is still mostly subsistence-oriented and livestock fulfil manifold functions a considerable number of livestock breeding programs have failed. The development of adequate tools to characterise these functions, bearing in mind that these are expressed only rarely in properly functioning markets, is therefore important.This paper seeks to advance the application of such methodologies to the smallholder pig sector in Vietnam. A choice experiment was applied across 140 households involved in pig breeding in order to assess farmers' preferences and the trade-offs for a list of adaptive and productive traits. These included growth, reproduction, disease resistance, feed requirements and appearance.The findings indicate that smallholders highly value both adaptive and performance traits, particularly in resource-driven (i.e. subsistence) production systems. Performance traits were more highly valued in the demand-driven (i.e. market-oriented) systems. These findings have implications for breeding program breed choice and breeding objectives. 相似文献
42.
Our paper contributes by bridging the gap between the (partial equilibrium) microsimulation and the computable general equilibrium (CGE) approaches, by making use of exact aggregation results from the discrete choice literature: heterogeneous individuals choosing within a set of discrete alternatives may be aggregated into a representative agent with (possibly multiple-level) constant elasticity-of-substitution/transformation preferences/technologies. These results therefore provide a natural link between the two policy evaluation approaches. We illustrate the usefulness of these results by evaluating potential effects of population ageing on the dynamics of income distribution and inequalities, using a simple overlapping generations model where individuals make leisure/work decisions, and choose a profession among a discrete set of alternatives. 相似文献
43.
Nesha Beharry-Borg David A. Hensher Riccardo Scarpa 《Environmental and Resource Economics》2009,43(1):95-117
This paper offers an analytical framework for analyzing joint and separate decisions by couples in the context of choice experiments
for nonmarket valuation. It reports results from an attribute-based stated preference study in which members of couples are
asked to conduct a choice-experiment first individually and then jointly. The choice context was the selection of which beach to visit while on vacation in Tobago. Available alternatives differed
in attributes related to coastal water and beach quality such as level of coastal development and fish abundance. Tests of
preference equality are reported and structured so as to identify the intra-couple decision-making patterns under taste heterogeneity
with both finite and continuous mixed logit. Results from the latter suggest that women’s preferences are found to be predominant
in the joint choice-experiment. Results suggest caution in using individual choice rather than joint couple choice when valuing
quality changes impacting on couple activities, such as water and beach quality in Tobago, and call for further research on
the topic. 相似文献
44.
Delivering Customer-Oriented Behaviour through Empowerment: An Empirical Test of HRM Assumptions 总被引:4,自引:0,他引:4
Organizational initiatives to strengthen customer orientation among front-line service workers abound, and have led many commentators to speak of the reconstitution of service work. These interventions rest on managers' assumptions about what engenders the desired customer-oriented behaviours among employees. We evaluate those assumptions in the context of a major change initiative in a supermarket firm. The logic of the programme mirrors key precepts in the contemporary management literature. These are that management behaviour, job design and values-based training can produce a sense of empowerment among employees, and that empowerment will generate prosocial customer-oriented behaviour. Using data from a large scale employee survey, we test the validity of those assumptions. Employees who perceived management behaviour in a positive light and who had participated in values-based training were more likely to feel empowered (i.e. to have internalized prosocial service values and to feel a sense of competence and autonomy on the job). Psychological empowerment was, in turn, positively related to the customer-oriented behaviour of workers. This study, therefore, provides support for key assumptions underlying HRM theory and practice in services. 相似文献
45.
Putu Liza Kusuma Mustika Riccardo Welters Gerard Edward Ryan Coralie D'Lima Patricia Sorongon-Yap Suwat Jutapruet 《Journal of Sustainable Tourism》2017,25(8):1138-1158
Dolphin-watching tourism is growing globally. In developing countries, the typically low environmental awareness of operators and poorly enforced or non-existent regulations exacerbate risks to wildlife. Ecological indicators like behavioural responses are useful to assess wildlife tourism, but obtaining such data is slow and expensive. We modified the Driver–Pressure–State–Impact–Response (DPSIR) framework to rapidly assess the risk of dolphin-watching tourism harming, displacing or causing local extinction to dolphin populations, using human dimension data to complement limited ecological data. We assessed industries at seven dolphin-watching sites in six countries in Asia: Cambodia, India, Indonesia, Malaysia, Thailand, and the Philippines. All sites have reached or almost reached financial saturation except Cambodia and Malaysia. We find high risk to dolphins at the sites in India and Indonesia and intermediate risk at the site in Cambodia. Pending more ecological data, the risk at Thailand, the Philippines, and Malaysian sites might be low. Our analysis also indicates site-specific conservation recommendations for Driver, Pressure and Response. We suggest that the DPSIR framework is useful to assess the risk of a wildlife watching industry, even when the impact is uncertain due to insufficient ecological data. 相似文献
46.
Valuing animal genetic resources: a choice modeling application to indigenous cattle in Kenya 总被引:5,自引:0,他引:5
In an effort to improve productivity and profits, many farmers have replaced traditional livestock breeds with higher yielding alternatives. While such changes may bring about short‐term economic gains, the loss of traditional livestock breeds could result in the loss of an important genetic resource as a variety of important genetic traits adapted to local conditions gradually become less common in the population. This is a particular problem in Africa, where livestock make a substantial contribution to human livelihoods. Using the example of cattle in Kenya's pastoral livestock markets this study uses a choice experiment approach to investigate buyers' preferences for indigenous breeds such as the Maasai Zebu. The analysis employs a latent class approach to characterize heterogeneity in valuations both within and across respondents buying cattle for breeding, slaughter, or resale. The results show that there are at least three classes of buyers with distinct preferences for cattle traits and that most buyers favor exotic rather than indigenous breeds. Such preferences have implications for the conservation of indigenous cattle in Kenya and in other developing countries and suggest that some form of intervention may be required to ensure the preservation of this important animal genetic resource. 相似文献
47.
Riccardo Scarpa John M. Rose 《The Australian journal of agricultural and resource economics》2008,52(3):253-282
We review the basic principles for the evaluation of design efficiency in discrete choice modelling with a focus on efficiency of WTP estimates from the multinomial logit model. The discussion is developed under the realistic assumption that researchers can plausibly define a prior belief on the range of values for the utility coefficients. D‐, A‐, B‐, S‐ and C‐errors are compared as measures of design performance in applied studies and their rationale is discussed. An empirical example based on the generation and comparison of fifteen separate designs from a common set of assumptions illustrates the relevant considerations to the context of non‐market valuation, with particular emphasis placed on C‐efficiency. Conclusions are drawn for the practice of reporting in non‐market valuation and for future work on design research. 相似文献
48.
Riccardo Petrella 《Technology Analysis & Strategic Management》1990,2(2):99-110
The globalization of the economy is a process driven by the enterprise. As enterprises form networks of alliances they tend to create huge oligopolistic structures on a global scale. Although these global enterprises are not subject to national norms, it is evident that a new alliance is growing up between the enterprise and the state. In the context of fierce international competition, enterprises need the support of the state, which is able to ensure that its 'national champions' enjoy optimum conditions for development; in return, successful enterprises are the state's best guarantee of national independence. But through this alliance the enterprise has acquired a totally new legitimacy, approaching that formerly reserved for the state, while the state finds itself engaged in global economic competition, which lacks adequate regulatory procedures. There is also a growing disassociation between globalized economic power on one hand, and political power conjned within national borders, on the other. There is a need to formulate a new regulatory framework, in order to overcome a situation where actors representing particular interests impose their own rules on actors representing the public interest. Such a framework would encourage the emergence of a transnational civilian society able to mobilize itself in the face of global economic, technological and environmental problems. 相似文献
49.
50.
Maria Grazia Pittau Riccardo Massari Roberto Zelli 《Oxford bulletin of economics and statistics》2013,75(4):556-584
We evaluate the magnitude of the disparities in the demand for redistribution across European countries and American states during the 2000s. Modelling the demand for redistribution in a multilevel framework, we identify the determinants that contribute the most in predicting support for redistribution. We observe that individual characteristics and contextual variables are associated with demand for redistribution in the same way in Europe and in the US, whereas others exert different influences on the probability of supporting redistribution. We find important differences from some well‐established evidence obtained from data collected for the 1980s and the 1990s. 相似文献