Consumers have always been concerned about the quality, and particularly the safety, of the foods they eat. In recent years this concern has taken on additional prominence. Consumer focus on food safety has been sharpened by reports about new risks, such as that posed by "mad cow" disease, and about more familiar sources of risk, such as food borne pathogens, pesticides, and hormones. At the same time, some consumers are in creasingly interested in knowing more about how their food is produced and in selecting products based on production practices. Some of the questions consumers are asking...