消费者对转基因和非转基因大豆油支付意愿差距测算的修正

发布时间：2018-12-18 19:48

【摘要】：近年来,转基因食品在市场上越来越常见,且数量和品种不断增加。由于我国大部分消费者对转基因技术缺乏科学认识,认为转基因食品可能带来健康风险,导致其对转基因食品的接受度不断下降。这一现象已经受到学术界的广泛关注,其中,已有学者对转基因大豆油的消费进行了深入研究,但其对消费者的样本选择并非随机抽样,导致支付意愿值的测算结果出现偏差。鉴于此,本文利用假设价值评估法设计了封闭式和开放,对北京市居民的大豆油消费情况进行了深入调查,并采用Heckman备择模型测算了消费者对非转基因大豆油的支付意愿,克服了样本选择偏差,更为准确地测算了消费者关于转基因和非转基因大豆油支付意愿的差距。在此基础上,解释了食用油市场上转基因大豆油"高市场占有率"和消费者"低接受程度"的"消费悖论"的形成机理。结果表明:消费者对非转基因大豆油的额外支付意愿值处于1.5-2.1元区间,溢价比例7.76%-10.28%;消费者的性别、年龄、教育程度、家庭月均收入与食品支出、非转基因食品认证的信任程度以及认证信息的重视程度对非转基因大豆油支付意愿具有显著影响。根据上述结论,健全转基因食品安全信息披露制度保障公众对转基因食品的知情权;开展转基因食品科普宣传活动,提高公众对转基因技术的认知;加强农业转基因技术研发和监管;扩大国产非转基因大豆的种植面积,满足消费者对非转基因大豆油的消费需求等政策建议。
[Abstract]:In recent years, GM food is becoming more and more common in the market, and the quantity and variety are increasing. Due to the lack of scientific understanding of GM technology in most consumers in China, GMFs may bring health risks, resulting in their acceptance of GM foods declining. This phenomenon has been widely concerned by the academic community, among which, some scholars have conducted in-depth research on the consumption of genetically modified soybean oil, but the sample selection of consumers is not random sampling, resulting in the deviation of the calculation results of willingness to pay. In view of this, this paper designs a closed and open method based on hypothetical value evaluation, and makes a deep investigation on the consumption of soybean oil in Beijing residents, and calculates the willingness of consumers to pay for non-genetically modified soybean oil by using Heckman alternative model. The difference of consumers' willingness to pay for genetically modified and non-genetically modified soybean oil was calculated more accurately by overcoming sample selection bias. On this basis, the formation mechanism of "high market share" of genetically modified soybean oil and "low acceptance degree" of consumers in edible oil market is explained. The results showed that the additional willingness of consumers to pay for non-GMO soybean oil was in the range of 1.5-2.1 yuan, with a premium ratio of 7.76 to 10.28 yuan. Gender, age, education level, average household income and food expenditure, trust in non-GM food certification and the importance of certification information had significant effects on the willingness to pay for non-GMO soybean oil. According to the above conclusions, improve the safety information disclosure system of genetically modified food to protect the public's right to know about the transgenic food, carry out propaganda activities on the popularization of science of transgenic food, improve the public's cognition of transgenic technology; To strengthen the development and supervision of agricultural transgenic technology, to expand the planting area of domestic non-GM soybean, to meet the consumer's consumption demand of non-GM soybean oil and other policy suggestions.
【作者单位】：中国人民大学农业与农村发展学院;国家粮食局科学研究院;
【基金】：国家自然科学基金重点资助项目教育部科技发展中心博士点基金课题(20130004110001) 农业部农产品质量安全监督(风险评估)项目(2130109) 广义虚拟经济技术研究专项资助项目(GX2015-1009(Y))的资助
【分类号】：F313.7;F713.55

【相似文献】