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排序方式: 共有117条查询结果,搜索用时 15 毫秒
1.
Single or double bounded contingent valuation? A Bayesian test 总被引:2,自引:0,他引:2
This paper evaluates the performance of asymptotic approximations of the Bayes factor to appraise the relative likelihoods of the bivariate and the restricted double bounded models for contingent valuation. The performance of the Bayes factor test is studied by Monte Carlo simulation showing that it correctly chooses the bivariate model when appropriate, but tends to over predict the double bounded model when the correlation coefficient is not estimated accurately. However, the quadratic error in estimating willingness to pay is reduced if the model preferred by the test is chosen. In addition, we consider the effect of averaging the estimates of WTP from both models, weighting each model with its posterior probability. The results show that ‘model averaging’ across the competing hypothesis further reduces the squared error. The applications with two data sets on National Parks show that the test rejects the restricted double bounded hypotheses against the bivariate model. 相似文献
2.
This paper develops a rational expectations framework for interpreting the coefficient on age in a standard hedonic model. The model demonstrates that there are two components to the age coefficient: a pure cross-sectional depreciation component and a demand-side component that changes over time. We also show that a constant quality price index with age constant can be estimated by using any repeat sales database that contains the year of construction (or property age). When Fairfax County data are fitted to the model, the time series of age coefficients is non-stationary: they change from negative in the early 1980s to positive in the late 1980s; we infer that the demand-side component dominated in the latter period. 相似文献
3.
María Xosé Vázquez Rodríguez Carmelo J. León 《Environmental and Resource Economics》2004,28(2):233-249
Altruism is a type of non-use value which can have different definitions depending on the type of goods entering the utility function of the altruists and their expectations about the contributions of others. The purpose of this paper is to measure the trade-offs between different types of altruist values originating from social and environmental policies. Environmental policies are concerned with reducing health effects from a power plant while social policies involve both the attainment of public facilities for education and leisure and an increase in the income of the affected population. The empirical application utilizes a choice experiment technique which allows for valuation of multiple goods. Health effects are decomposed into the values of the risk of becoming ill, the duration of the episodes and the limitations imposed by illness. Altruist values are elicited from a population that is not affected by pollution. Results show that altruism is significant for policies directed to reducing health effects and improving the income level of the affected population, whereas there is egoism for a policy aimed at improving public facilities in the polluted suburb. The value of altruism is significantly influenced by the expectations of net benefits to be received by the affected population. 相似文献
4.
Building the Knowledge Stock: Lags,Depreciation, and Uncertainty in R&D Investment and Link with Productivity Growth 总被引:1,自引:0,他引:1
The search for an appropriate methodology to investigate the relation between R&D investment, knowledge stock and productivity growth is the main purpose of the paper. In analogy with physical assets, we present a model of knowledge capital formation which allows the calculation of the relevant user cost, as well. The proposed model accumulates R&D investment based on a stochastic gestation lag and a geometric depreciation of the stock. The basic parameters underlying the lag structure differ according to the types of research expenditure. The approach is applied to public R&D investment in Italian agriculture; the results provide interesting information about the economic structure of public research effort in Italian agriculture and plausible estimates of its internal rate of return. 相似文献
5.
This paper presents a model of the interactions between natural resources and physical capital in the evolution of a tourist destination. The projected trajectory of the number of tourists approaches the classical lifecycle pattern. The post-stagnation phase is analyzed within the model, obtaining different patterns which depend on the impacts of physical capital on both demand and environmental degradation. The magnitudes of these impacts are determined by the type of tourism. An empirical application to the case of the tourist industry in the Canary Islands (Spain) is presented, showing that the model can represent the general characteristics of the post-stagnation phase of a tourist destination. 相似文献
6.
Beniamina Buzzo Margari Fabrizio Erbetta Carmelo Petraglia Massimiliano Piacenza 《Journal of Regulatory Economics》2007,32(2):131-151
This paper assesses the impact of regulatory and environmental factors and statistical noise on the efficiency of public transit
systems within a DEA-based framework. Using a panel of Italian companies, we implement a DEA-SFA mixed approach based on [H.O.
Fried et al. (2002) Journal of Productivity Analysis, 17(1–2), 157–174] to decompose DEA inefficiency measures into three components: exogenous effects, managerial inefficiency and
stochastic events. Besides providing evidence on the determinants of input-specific efficiency differentials across companies,
the results point out that managerial skills play a minor role, and emphasize the relevance of regulatory policies aimed at
replacing cost-plus subsidization with high-powered incentive contracts as well as improving environmental conditions of public
transit networks.
相似文献
7.
Hoesli Martin Giaccotto Carmelo Favarger Philippe 《The Journal of Real Estate Finance and Economics》1997,15(1):93-109
This paper develops constant-quality price indices for three categories of real estate-apartment buildings, vacant land, and condominiums—for the city of Geneva, Switzerland. We use both the hedonic and repeat sales models to estimate the price level and, in turn, the rate of price change. The general pattern of each series suggests that real estate prices in Geneva were fairly stable throughout the 1970s, increased sharply during the 1980s, but gave back some of these gains in the early 1990s. Interestingly, the sharp rise in prices in the second half of the 1980s is very similar to that found in some regions of the United States. We also consider the problem, implicit in the repeat sales method, of revisions in previously estimated price indices as additional data become available in later years. 相似文献
8.
This article presents a model of political corruption in which a briber can choose either to bribe only the incumbent party or to capture also the opposition party to sterilize its monitoring role. The analysis also explores interparty collusion, media independence, and political contestability. The model suggests that policies aiming to strengthen the role of minorities can produce ambiguous effects as they may induce bribers' avoidance behavior. Reputational sanctions appear to be less effective than criminal ones, although political contestability increases their deterrence effect. Paradoxically, harsh criminal sanctions may induce tacit collusion because minorities highly regard their outcomes once in power. 相似文献
9.
Nicola Bellantuono Donatella Ettorre Gregory E. Kersten Pierpaolo Pontrandolfo 《Group Decision and Negotiation》2014,23(3):421-441
The paper addresses the topic of e-procurement of logistics services and examines how the system that companies adopt to support this task affects the process performance. The system is evaluated in terms of substantive outcomes (e.g., logistics providers’ profits) and other performances related to perceptions and behavioral issues. Specifically, the considered system is characterized by the exchange mechanism that rules the transaction (multi-attribute auction vs. negotiation) and the level of problem complexity. The analysis, conducted via a laboratory experiment, shows that both the exchange mechanism and the problem complexity affect performance. Practical implications, which could help companies design effective e-procurement systems, are discussed. 相似文献
10.
In this paper, we investigate gender differences in workers’ career development within and outside the firm to explain the existence of gender wage gaps. Using Danish employer–employee matched data, we find that good female workers are more likely to move to better firms than men but are less likely to be promoted. Furthermore, these differences in career advancement widen after the first child is born. Our findings suggest that career impediments in certain firms cause the most productive female workers to seek better jobs in firms in which there is less gender bias. 相似文献