A survey with validation question was delivered to 3475 respondents to study the impact of using validation question to improve data quality. Results show that The respondents who passed the validation question had significantly older ages, higher median incomes and higher education levels. The...

Replaced with revised version of paper 07/14/11.

Information on production methods (genetic modification or organic production) and locations (country of origin) are commonly found on food package labels. Both pieces of information may be used as a proxy for food safety and quality by consumers. Our study investigates the interactive effects...