Stochastic Technology, Risk Preferences, and Adoption of Site-Specific Technologies

A model of farmer decision making is developed to determine the extent to which uncertainties about soil fertility and weather affect the value of site-specific technologies (SSTs) using jointly estimated risk and technology parameters. Uncertainty can lead risk-averse farmers to apply more fertilizers and generate more pollution than in the certainty case. Ignoring uncertainty and risk aversion would overestimate the economic and environmental benefits of SSTs and underestimate the subsidy required to induce adoption. Accounting for uncertainties and risk preferences might explain the low observed adoption rates of SSTs. Improving the accuracy of SSTs would increase the incentives for adoption.     

Estimating Willingness to Pay for Improved Water Quality in the Presence of Item Nonresponse Bias

This article deals with the problem of item nonresponse in contingent valuation surveys using a payment-card method, by applying a grouped-data sample-selection estimation technique that is capable of imputing the missing values conditional upon a respondent's decision to answer a willingness-to-pay question. The advantage of the technique lies in its ability to utilize all of the information in the sample, permitting a more efficient estimation in the presence of item nonresponse bias. The major determinants of willingness to pay appear to be household income, number of children, education, perception of existing water quality, and identification with environmental issues.     

对《形状和位置公差》新标准的理解和应用

通过对《形状和位置公差》新、旧国际的对比，综述了新、旧标准间的不同之处、便于迅速了解和应用新标准。     

Price rigidities and institutional variations in markets with posted prices

Summary Standard laboratory posted-offer markets respond slowly and incompletely to demand shocks. In these one-sided markets, where sellers control the setting of prices, very little information is transmitted via the process of exchange. For this reason, traders have trouble distinguishing randomness in their own experience from changes in market fundamentals. This paper reports the results of twelve laboratory markets conducted to assess whether some common variants to standard posted-offer rules can correct the adjustment deficiences. Although discounting, multiple postings and excess demand information all improve performance, we find that response remains poor, and efficiencies low.Support for this research was provided by the National Science Foundation (SBR 9319842 and SBR 9320044), and the University of Virginia Bankard Fund. Data are archived at FTP address: fido.econlab.arizona.edu. We wish to thank Charles Plott and Shyam Sunder for useful comments on an earlier draft of this paper. The usual disclaimer applies.     

分布式通信流分析系统的实现

文章介绍了通信流分析以及匿名通信的研究现状,并分析了现在研究通信流分析所采用的几种流分析工具,指出他们对于匿名通信的通信流分析的不足之处,最后,提出了适应于匿名通信的分布式通信流分析系统的实现方法。     

上市公司会计造假的成因与规避对策

上市公司会计造假总有一些惯用手法，这是由于公司治理结构不完善，证券市场缺陷，会计收益大于造假成一，外部审计乏力以及会计理论局限性等方面所致，应该采取相应的对策来规避会计造假带来的严重后果。     

利率调整对我国出口贸易的影响

在市场经济条件下,利率是灵活的经济杠杆,是国家最常使用的微调工具,对一国的微观、宏观经济运行有着极其重要的调节作用。本文从信贷、汇率和资本流动与利率之间的关系分析调整利率对我国出口贸易的影响。     

民族地区投融资机制的构建与经济可持续发展

金融日益成为现代经济的核心，资本形成对经济增长具有重要作用。民族地区作为一个金融抑制较为严重的地区，在经济社会发展的历史进程中，必须通过投融资机制创新为资本形成创出更为广阔的空间，充分发挥金融对于促进民族地区经济可持续发展的重要作用。     

论军服式样对服装文化的影响

该文认为．在人类服饰文化的悠久历史中．不同时期各领风骚的流行服装式样或多或少地都受到了军队服装的影响．军队服装已经渗入到人类服饰文化的方方面面．对推动服饰变革起着重要的作用．     

新形势下增强青少年德育的思考

针对处在世纪之交、社会转型期的青少年思想道德的基本状况及其形成的主要原因,转变观念,优化措施,增强思想道德教育.