Bitcoin price and its marginal cost of production: support for a fundamental value

This study back-tests a marginal cost of production model proposed to value the digital currency Bitcoin. Results from both conventional regression and vector autoregression (VAR) models show that the marginal cost of production plays an important role in explaining Bitcoin prices, challenging recent allegations that Bitcoins are essentially worthless. Even with markets pricing Bitcoin in the thousands of dollars each, the valuation model seems robust. The data show that a price bubble that began in the Fall of 2017 resolved itself in early 2018, converging with the marginal cost model. This suggests that while bubbles may appear in the Bitcoin market, prices will tend to this bound and not collapse to zero.     

Evidence on the existence of speculative bubbles in farmland prices

We conduct tests for the contribution of speculative bubbles to farmland prices. These tests are carried out under the hypothesis that farmland investors rationally form expectations. The outcome of tests reported here allows us to infer whether farmland prices are determined by market fundamentals-discounted returns from the highest economic land use-or whether rumors about farmland price movements are self-fulfilling. The tests are stationarity and cointegration tests relating farmland prices to rents. The tests are carried out using data from three farm production regions-the Corn Belt, the Northern Plains, and the Lake States. In each region, we find little evidence to reject the hypothesis that market fundamentals determine farmland prices.     

Modelling soccer matches using bivariate discrete distributions with general dependence structure

In this paper copulas are used to generate bivariate discrete distributions. These distributions are fitted to soccer data from the English Premier League. An interesting aspect of these data is that the primary variable of interest, the discrete pair shots-for and shots-against, exhibits negative dependence; thus, in particular, we apply bivariate Poisson-related distributions that allow such dependence. The paper focuses on Archimedian copulas, for which the dependence structure is fully determined by a one-dimensional projection that is invariant under marginal transformations. Diagnostic plots for copula fit based on this projection are adapted to deal with discrete variables. Covariates relating to within-match contributions such as numbers of passes and tackles are introduced to explain variability in shot outcomes. The results of this analysis would appear to support the notion that playing the 'beautiful game' is an effective strategy—more passes and crosses contribute to more effective play and more shots on the goal.     

绿色壁垒对我国纺织服装业的影响研究

为了避免绿色壁垒对我国纺织服装业造成更大的经济损失,保持行业的持续健康发展,本文分析了绿色壁垒对我国纺织服装业带来的积极影响和消极影响,进而提出应对绿色壁垒消极影响的措施。     

按劳分配与收入公平分配

按劳分配与收入公平分配存在正相关,主要表现在按劳分配存在前提和分配主体转换的公平性、分配依据和利益结构及其主体地位的合理性五个方面.按劳分配的实践与收入公平分配存在负相关,主要表现在由于理解上的偏差、应用中的偏差、实施对象客观条件不同而导致收入分配中事实上的不公平.为了强化按劳分配与收入公平分配的正相关、弱化按劳分配的实践与收入公平分配的负相关,必须采取相应对策.     

由中国国歌的英语译法浅析汉英正反译法的相互应用

翻译学是一门综合社会科学,包括文学翻译,句法翻译,科技翻译,同声翻译和电脑翻译等学科,其采用的方法的手段又是多样的,诸如:直译、意译、扩译、省译、词类转换和正反译等等,但所遵循的原则是译者用一种语言表达原作者用另一种语言所表达的同一概念或思想。该文力图通过具体的实例浅析正反译法在翻译实践中的相互应用。     

税收公平伦理视角下的个人所得税制建构

税收公平原则富含社会伦理的思想。对个人所得税的征管，不仅要强调其经济功能，更要关注其社会公正和伦理维护的社会功能。我国的个人所得税制存在纳税人身份确定、纳税能力确定、征税范围确定三个方面的公平伦理扭曲。因此，新的个人所得税构想中应当强调全民纳税、量能负担原则，实行低累进税率和负所得税税率，同时要改进征管模式。     

粮食主产区农民收入影响因素的计量分析

粮食主产区农户家庭收入与农户家庭劳动力受教育水平、粮食单产、优质粮食品种播种面积、农户家庭投资能力呈正相关,与农户家庭农业劳动时间呈负相关.农户家庭社区特征和家庭特征对农户家庭收入发挥着重要的影响作用.粮食主产区应扩大优质粮食品种种植面积,加快剩余劳动力转移,提升农户家庭投资能力,从而提高粮食主产区农民收入.     

Existence of a competitive equilibrium in a one sector growth model with heterogeneous agents and irreversible investment

Summary. We prove existence of a competitive equilibrium in a version of a Ramsey (one sector) model in which agents are heterogeneous and gross investment is constrained to be non negative. We do so by converting the infinite-dimensional fixed point problem stated in terms of prices and commodities into a finite-dimensional Negishi problem involving individual weights in a social value function. This method allows us to obtain detailed results concerning the properties of competitive equilibria. Because of the simplicity of the techniques utilized our approach is amenable to be adapted by practitioners in analogous problems often studied in macroeconomics. Received: September 13, 2001; revised version: December 9, 2002 RID="*" ID="*" We are grateful to Tapan Mitra for pointing out errors as well as making very valuable suggestions. Thanks are due to Raouf Boucekkine and Jorge Duran for additional helpful discussions. We also thank an anonymous referee for his/her helpful comments. The second author acknowledges the financial support of the Belgian Ministry of Scientific Research (Grant ARC 99/04-235 “Growth and incentive design”) and of the Belgian Federal Goverment (Grant PAI P5/10, “Equilibrium theory and optimization for public policy and industry regulation”). Correspondence to: C. Le Van     

上市公司偏好低现金股利政策的理论思考

上市公司偏好低现金股利政策,损害了中小投资者的利益,加剧了市场投机行为,降低了经营者的风险意识,已成为我国资本市场正常运行与健康发展的一大障碍。本文通过分析我国上市公司偏好低现金股利政策的负面影响和成因,据此提出相关的政策建议。