. >> rob barnett used to weigh a nhe.ey lost around 125 dd they say they did it using the' book "thets' diet: the surprising formula for losing weight and published by touchstone, an imprint ofim division of cbs. welcome in. i'm not reaw weight. >> it's always kind of failed. so many vieweried to lose weight and they try a shortcut method and put ton. we've been there and done that. the real issue here is so mh fod for you. you know, the way --, well, the this clags of bad foochld we no salad were good for me. it was about changing my behavior. >> people need more nutritional tinformatm because you had your own bout with inflation, i guess you could le. you're economists. you don't have a degree in medicine. gs have the answer that these thousands of diet books that >> i would say it's because we're framing the problem as on impose scarcity, having toatin yourself. it's really about behavi econom conditions, and adjusting behavior accordingly. once you f realize, again, as rob said, to help. it's about how to eat less. >

. >> economists chris payne and rob barnett used to weigh a whole lot more than they do now.round 125 pounds -- well done, guys -- and they say they did it using the principles of economics. it's all described in their new book "the economists' diet: the surprising formula for losing weight and keeping it off," published by touchstone, an imprint of simon & schuster, a division of cbs. welcome in. i'm not ready to lose weight. >> it's always kind of failed. so many viewers have tried to lose weight and they try a shortcut method and put the weight back on. we've been t abundance. there's so much food that is bad for you. you know, the way -- economics is about saying, well, there's this clags of bad foochld we need an economic economic solution to really an economic problem. >> i already knew that vegetables and salad were good for me. it was about changing my behavior which we did through -- >> people need more nutritional information. >> you're economists. you don't have a degree in medicine. what makes you think that you guys have the answer that these thousands of diet bo