BURIED in the nearly 2,000 pages of the health reform bill passed by the House on Saturday is a provision requiring chain restaurants to post calorie counts on their menus. Given the worsening problem of obesity in the United States, and the superiority of disease prevention over treatment, calorie posting seems like a great idea. However, research by us and others suggests that it is unlikely to have much, if any, impact on eating or obesity.
There have now been three studies of New York City’s menu-labeling legislation, which took effect last year and serves as a model for the national legislation. One relatively small study conducted by researchers at New York University and Yale and published in the journal Health Affairs found no impact of labels on healthier eating, although the sample wasn’t large enough to detect modest changes.
We conducted a somewhat different study, supported by the United States Department of Agriculture and published in American Economic Review earlier this year, that examined purchases by 1,479 McDonald’s customers in New York City in 2007 and 2008, both before and after menu labeling went into effect.
Beyond simply measuring the impact of labeling, we gave some diners information about how many calories one is recommended to consume per day or per meal, anticipating that this information would help diners to make use of the posted calorie information. However, we found that this did not help diners use menu labels, and we saw no impact on calorie consumption.
http://www.nytimes.com/2009/11/13/opinion/13lowenstein.html?th&emc=th