Prevention versus Treatment under Precautionary Regulation: A Case Study of Groundwater Contamination under Uncertainty

Policy discussions on agricultural pollution problems characterize prevention as more cost effective and precautionary than ex post treatment. We derive conditions under which treatment alone is more cost effective in situations involving multiple sources of emissions, multiple sites affected, and a commonly used precautionary approach to uncertainty. We also show that a greater degree of precaution can result in less reliance on prevention. An empirical case study indicates that treatment alone is the most cost-effective means of dealing with nitrate in most Maryland community water system wells. The use of leaching prevention measures is restricted to the most intensive poultry producing areas. The incremental cost of precaution is substantial.     

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.     

小氮肥清洁生产实践

文章介绍了沅江市氮肥厂废水闭路循环、尾气回收、废渣综合利用等工程,并介绍了该厂的生产工艺、污染源分布及排污特点。     

全球化背景下中国文化的创新

经济全球化的进程已经深刻地波及到文化领域。面对全球化的态势我们必须深刻地反思中国文化及文化产业所面临的一系列问题。发展建设中国文化及文化产业 ,最根本的问题就是要解决文化创新的问题 ,即实施国家文化创新、文化思想学术创新和文化观念创新。     

民营企业党建与企业文化塑造的整合研究

该文认为，随着民营经济在国民经济中地位的迅速提高，民营企业党建工作日显重要。在实战中民营企业党建工作可以从塑造先进企业文化的角度切入，实现民营企业党建工作与民营企业文化塑造的整合，以便最有效地促进企业经济的健康发展。     

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．     

网络文化给高校思想政治教育带来的挑战

阐述网络文化给高校思想政治工作带来的挑战和影响,分析产生这种挑战和影响的原因,籍此给高校思想政治教育工作以警示和借鉴。     

从传统文化看我国信用体系的构建

本文通过对中国传统信用文化特色的分析,指出我国信用体系的构建需要利用我国的传统文化资源。