分析“分析美学史”的价值——序刘悦笛的《分析美学史》

作为对分析哲学的令人欣喜的贡献,刘悦笛的《分析美学史》,有助于形成对20世纪西方社会中的哲学美学的整体进程的基本理解。刘悦笛的文本正确估价了分析哲学对于美学研究的贡献,其所追踪的历史进程横亘了整个20世纪。这项任务主要是通过从美学家的贡献到美学主题的贡献的诸章节来共同实现的,每章在介绍与总结的部分都提出了作者自己对于分析美学重要性的解释和评价。刘悦笛所选择的美学家们对于这部分析美学简史而言是毫无疑义的,因为他们形成了在这场运动当中的最重要的形象。这种选择代表了一种系统的结构,这对于非西方读者们更深入地理解分析美学具有特别的重要价值。在对历史的精细的组织与敏锐的洞见当中,刘悦笛所提供的坚实的基础,对于学者和学生们而言就像一个坚实的平台,可以由此去探索那些在分析美学史上提出令人瞩目的理念的人们的作品。     

Safe storage of dilute ethylene oxide mixtures in water

In the past industry has had to rely on a number of “rules of thumb” to provide a means of reasonable analysis for many design, operation, safety and similar issues. The lack of readily available computing facilities made the use of “rules of thumb” a necessary part of doing business in the hydrocarbon processing industry. And these “rules of thumb” have proven useful and allowed many tasks to be accomplished successfully. Today, however, availability of mainframe computers or desktop computing facilities has provided a tool that has decreased the need to rely on “rules of thumb.” And in many cases processing improvements can only be accomplished by replacing “rules of thumb” with more rigorous analysis. In the ethylene oxide producing/consuming industry a widely-used “rule of thumb” concerns the storage of ethylene oxide water solutions. A well-publicized “rule” stated that solutions in excess of 1-2 weight percent ethylene oxide in water should not be stored [1]. This “rule” is certainly valid in many situations. However, this guideline may be unnecessarily restrictive in other cases. The impact of several key process parameters impacts the amount of ethylene oxide in water than can be safely stored. This study will show that higher concentrations of ethylene oxide in water can be safely stored under the right circumstances. The study will also discuss the key variables that determine whether aqueous ethylene oxide solutions can be safely stored. Finally, a methodology used in determining how much ethylene oxide in water can be safely stored will be outlined.     

Evaluating an Agricultural Extension Program Aimed at Improving Biodiversity in Alberta,Canada

We evaluate an agricultural extension program aimed at increasing on‐farm biodiversity in Alberta. Using reports prepared for program participants by the extension agency, customized surveys were used to collect data on whether recommended practices were adopted. Data were also collected from producers who were willing but unable to participate in the program due to its unexpected cancellation. A count model compared the number of practices adopted by participants and nonparticipants to evaluate the program's efficacy, and a probit model using participants’ adoption data were used to understand factors affecting adoption. Simple, low‐cost, and easily trialed practices were adopted at high rates, though some higher cost practices associated with observable benefits were also adopted at moderate or high rates. Farm‐specific characteristics, such as size, tenure, or group membership were also significantly linked to the likelihood of adoption. Results suggest that the extension program was successful in encouraging adoption of environmentally beneficial practices with caveats; project completion and quality were not verified, and decreasing marginal returns to extension efforts may have been realized within the small participant pool. Nous évaluons un programme d'éducation permanente en agriculture visant l'augmentation de la biodiversité fermière en Alberta. Utilisant des rapports préparés par les agences d'éducation pour les participants de programmes, des sondages individualisés ont servi à la collecte de données concernant l'adoption de pratiques recommandées. Des données ont aussi été recueillies auprès de producteurs qui auraient voulu participer mais qui n'ont pas profité du programme suivant son annulation inattendue. Un modèle de comptage a servi à comparer le nombre de pratiques adoptées par les participants et non‐participants pour évaluer l'efficacité du programme, et un modèle probit basé sur les données d'adoption par les participants a servi à comprendre les facteurs ayant un impact sur l'adoption. Les pratiques simples, peu coûteuses et faciles à tester ont été hautement adoptées. Certaines pratiques à coûts plus élevés, associées à des avantages observables, ont aussi vu des taux moyens et élevés d'adoption. Les caractéristiques spécifiques aux exploitations agricoles comme la taille, la longévité et l'adhésion à un groupe se sont aussi trouvées liées de façon significative aux probabilités d'adoption. Les résultats suggèrent que le programme d'éducation permanente a réussi à encourager l'adoption de pratiques bénéfiques pour l'environnement avec quelques bémols: la réalisation des projets et leur qualité n'ont pas fait l'objet de vérification, et la diminution des rendements marginaux en fonction des efforts d'éducation pourrait avoir été réalisée dans le cadre d'un petit bassin de participants.     

Requests for zoo visitors to undertake pro-wildlife behaviour: How many is too many?

Recognising the potential conservation impact, zoos regularly ask their visitors to undertake pro-wildlife behaviour. This paper presents the results of two studies undertaken to address the question: how often during a visit should visitors be asked? Study 1 sought to a) determine individuals' personal thresholds and b) the point where the number of different behaviours requested began affect visitors' experiences. Study 2 sought the same, but focused on requests for the same behaviour. Results suggest that few respondents' personal thresholds were crossed (2.5% in Study 1 and 9% in Study 2). In neither study did many respondents (2.5% in Study 1 and 2.8% in Study 2) feel that the number of requests negatively affect their overall zoo experience. While there are caveats, we conclude that there appears little cause for concern about asking zoo visitors on multiple occasions to act in support of wildlife. Indeed, such requests may improve experiences.     

U.S. Competitive Position and Capital Investment Flows in the Economic Citizen Market:

ABSTRACT Many countries hail economic citizenship as the new mechanism for encouraging capital mobility and economic development. Economic citizenship is the process of granting citizenship or residency to foreign individuals who have investment capital that will create jobs for citizens in the immigrant receiving country. Many developing and developed countries, including the Commonwealth of Dominica and Belize, Canada, Australia, and the United States, have embraced this concept with hopes of massive capital inflows to their countries. While this investment measure has been successful in a few countries, the U.S. has only been able to attract less than 10% annually of the targeted number of investors through this strategy. The U.S. has been further from its targeted annual allocation of visas than Dominica and Canada. The Economic Citizenship Program has less potential of affecting a small nation's levels of investment than a large one's. A number of socio-political and economic reasons, including program cost and social adjustment, cause a slow influx of new immigrants and investments to the U.S.     

Endogenous Cartel Formation

This paper investigates the endogenous formation of cartels in a supergame framework in which cheating on the cartel agreement results in the ejection of only the defector from the cartel while collusion continue s amongst the non-cheating members. A more sophisticated notion of cartel stability than has been analysed hitherto is developed here, and it is shown that cartels are even less stable than they are generally believed to be. When firms produce heterogeneous goods and set prices, cartels comprising a small fraction of the industry's firms are shown to be viable. The emergence of two or more cartels within the same industry is seen not only to be a distinct possibility but also to be quite likely     

Genetically Modified Food Market Participation and Consumer Risk Perceptions: A Cross-Country Comparison

As developing nations look to become more competitive in world agricultural markets, genetically modified (GM) crops are one avenue of pursuit. However, fears of primary export market loss, negative media attention, and adverse government regulations often hinder GM crop implementation and increase GM food risk perceptions among domestic consumers. In this study we analyze consumer surveys of GM food purchase propensity conducted in the developing countries of Romania and China. Through the examination of marginal effects and the drivers of purchase propensity, we find that in spite of demographic and psychographic similarities, consumer willingness to purchase GM foods is quite different between the two samples. Consumer preferences are largely dependent on risk perceptions, which are high in the Romanian sample, but low in the Chinese sample. Additionally, the effect of regressors on GM purchase propensity is invariant across foods in Romania, but distinctly different across foods in China, possibly due to the stated nutritional enhancement (vitamin A) in GM rice. Comme les pays en développement cherchent à devenir plus concurrentiels sur les marchés agricoles mondiaux, les cultures génétiquement modifiées (CGM) constituent une avenue. Cependant, la crainte de perdre les principaux marchés d'exportation, l'attention médiatique négative et les règlements gouvernementaux défavorables retardent souvent l'ensemencement de CGM et augmentent la perception des risques liés aux aliments génétiquement modifiés (AGM) chez les consommateurs nationaux. Dans la présente étude, nous avons analysé des enquêtes auprès des consommateurs sur la propension à acheter des AGM dans les pays en développement, notamment la Roumanie et la Chine. En examinant les effets marginaux et les facteurs de propension à acheter, nous avons trouvé que, malgré des similarités démographiques et psychographiques, la volonté des consommateurs à acheter des AGM variait considérablement dans les deux échantillons. Les préférences des consommateurs dépendent grandement de la perception des risques, qui était élevée dans l'échantillon de la Roumanie et faible dans l'échantillon de la Chine. De plus, l'effet des variables indépendantes sur la propension à acheter des AGM était invariant pour tous les aliments en Roumanie, mais distinctement différent entre les aliments en Chine, probablement en raison de l'enrichissement nutritionnel déclaré (vitamine A) du riz génétiquement modifié.     

Endowment Origin,Demographic Effects,and Individual Preferences in Contests

In modern firms the use of contests as an incentive device is ubiquitous. Nonetheless, experimental research shows that in the laboratory subjects routinely make suboptimal decisions in contests even to the extent of making negative returns. The purpose of this study is to investigate how earning the endowment, demographic differences, and individual preferences impact behavior in contests. To this end, we conduct a laboratory experiment in which subjects expend costly resources (bids) to attain an award (prize). In line with other laboratory studies of contests, our results show that subjects overbid relative to theoretical predictions and incur substantial losses as a result. Making subjects earn their initial resource endowments mitigates overbidding and thus increases efficiency. Overbidding is linked to gender, with women bidding higher than men and having lower average earnings. Other demographic information, such as religiosity, and individual preferences, such as preferences toward winning and risk, also influence behavior in contests.     

Cost-effectiveness of telaprevir in combination with pegylated interferon alpha and ribavirin in treatment-experienced chronic hepatitis C genotype 1 patients

Background:

Telaprevir (TVR,T) and boceprevir (BOC,B) are direct-acting antivirals (DAAs) used for the treatment of chronic genotype 1 hepatitis C virus (HCV) infection. This analysis evaluated the cost-effectiveness of TVR combined with pegylated interferon (Peg-IFN) alfa-2a plus ribavirin (RBV) compared with Peg-IFN alfa-2a and RBV (PR) alone or BOC plus Peg-IFN alfa-2b and RBV in treatment-experienced patients.

Methods:

A Markov cohort model of chronic genotype 1 HCV disease progression reflected the pathway of experienced patients retreated with DAA therapy. The population was stratified by previous response to treatment (i.e., previous relapsers, partial responders, and null responders). Sustained virologic response (SVR) rates were derived from a mixed-treatment comparison that included results from separate Phase III trials of TVR and BOC. Incremental cost per life year (LY) gained and quality-adjusted-life-year (QALY) gained were computed at lifetime, adopting the NHS perspective. Costs and health outcomes were discounted at 3.5%. Uncertainty was assessed using deterministic and probabilistic sensitivity analyses. Sub-group analyses were carried out by interleukin (IL)-28B genotype.

Results:

Higher costs and improved outcomes were associated with T/PR relative to PR alone for all experienced patients (ICER of £6079). T/PR was cost-effective for each sub-group population with high SVR advantage in relapsers (ICER of £2658 vs £7593 and £20,875 for partial and null responders). T/PR remained cost-effective regardless of IL-28B sub-type. Compared to B/PR, T/PR prolonged QALYs by 0.57 and reduced lifetime costs by £13,960 for relapsers. For partial responders T/PR was less costly but less efficacious than B/PR, equating to an ICER of £128,117 per QALY gained.

Limitations:

No head-to-head trial provides direct evidence of better efficacy of T/PR vs B/PR.

Conclusion:

T/PR is cost-effective compared with PR alone in experienced patients regardless of treatment history and IL-28B genotype. Compared to B/PR, T/PR is always cost-saving but only more effective in relapsers.