Consumer's Willingness to Pay for Organic Food in the Perspective of Meta-Analysis

With the concern for the market of food safety, abundant researches on consumer's WTP for organic food have been carried out. With meta-analysis, this paper aims to confirm whether diverge estimates from various researches are relaible and to explore the sources of heterogenicity in terms of four espects: sampling err, socio-economic characteristics of sample, research methods and research objects. It shows that there is a wide range of WTPs among researches on organic food where the maximum value shoots up to 509.2% and the minimum value touches down to 2.3%. The sample size of empirical survey should be at least above 200. Open-ended question format, household randomly sampling method and personal interview survey are much more appreciated