中文摘要：

条件估值法（Contingent valuation method，CVM）在评价环境服务产品中起着不可替代的作用。通过对CVM的信度、效度、置信度、质量控制方面进行探讨，并对Logistic回归模型进行的改进，研究结果显示：（1）通过科学的问卷设计和规范操作，严格调研的质量控制可以有效地克服CVA法的不足，减少主观随意性对访谈结果的干扰。（2）质量控制方法主要通过控制信度、效度、置信度、问卷有效性、数据质量和调研员质量来实现，数据质量保障主要通过第一，抽样环节注意随机性和调查样本的代表性。第二，调研员和质量监督员的培训。第三，检验和回访。第四，调查后的质量控制。主要注重调查问卷的登记与编码和数据录入的质量控制。第五，资料整理质量控制，资料获取和整理后由质量控制人员、专家检验调查质量，发现问题，采取适当的补救措施。通过控制质量，保证了问卷调研的可信度。（3）蚌埠居民年支付意愿为每户9．35元／月，全年支付意愿总额为7831．56万元人民币。（4）不同的收入段相关性又呈现差异性，年收入15000～30000元的公务员、教师、律师、高薪企业工人、军人支付意愿较高。

英文摘要：

Contingent valuation method （CVM） has irreplaceable role for evaluation of environmental services products. In this paper, CVM reliability, validity, confidence, and quality control were discussed, and Logistic regression model was improved with a case at Bengbu City, Anhui Province, China. It is suggested that （ 1 ） Through the design of the questionnaire and scientific standards, strictly controlling the quality of research can effectively o- vercome the shortcomings of CVA, reducing subjective arbitrary interference on the results of interviews ; （2） Quality control is realized mainly through control of reliability, validity, the confidence level, the validity of the questionnaire, data quality and the quality of researcher to achieve. The quality of data protection is finished mainly through the following steps： firstly, when sampling, to pay attention to the random and representative sample; secondly, to put stress on the researcher and monitors＇ training quality; thirdly, to make the rexamination; fourthly, for the investigation quality control, to focus mainly on the questionnaire registering, coding and data recording; fifthly, to lay stress on the documentation and data quality through staff and experts＇ test, sometimes to take appro- priate remedial measures. Quality control can ensure the credibility of the survey questionnaire; （3） Bengbu residents＇ each household will pay 9.35 Yuan for each month and all city will pay a total of 78. 315 6 million Yuan a year; （4）Different income＇s people are with different payment willingness. The people with 15 000- 30 000 Yuan annual income, such as civil servants, teachers, lawyers, high-paying cooperation workers, are with the highest willingness to pay. The establishment of regional ecological funds may be an effective method.