Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Robert Kelly is managing director of XTS ...

1. An indifference curve is defined as a set of bundles that a consumer with a given income can afford, and among which she or he is indifferent. 2. More is preferred to less means that if the total ...

Caroline Banton has 6+ years of experience as a writer of business and finance articles. She also writes biographies for Story Terrace. Robert Kelly is managing director of XTS Energy LLC, and has ...