stickk.com is an internet company co-founded by economist dean karlan in 2007.and provides a stick or negative incentive to influence behavior. it's one of a handful of companies, including beeminder and healthywage that provide an online platform to turn goals into what are known as commitment contracts. with stickk, users put money on the line for any goal, from trying to lose weight to saving more money each week. and can designate a referee to oversee their progress. >> basically what the research showed is, hey, money talks. and when you've got your money on the line and you put your money where your mouth is you're much more likely to achieve your goal. >> reporter: jordan goldberg co- founded stickk with karlan and another professor when he was an mba student at yale. he says the financial stick makes long-term goals easier to reach. >> so we are literally raising the price of your vice (your poor behavior) raising the price of failure so that you'll make the right decision today. >> reporter: if you fail to meet your goal, you lose the money. it goes to

karlan, a 25-year-old doctoral couldn't at indiana university, was on the plane. she was a decorated member of the varsity rowing team. >> knowing her. >> reporter: her classmate also remembered her smile. >> she was always smiling. she was always positive. >> reporter: the fields of eastern ukraine are calm now. it is the calm of bewildering and senseless tragedy. and the dead who cry out from here for justice. for "nightline," i'm terry moran, in kharkiv ukraine. >>> next, what are we learning about the criminals believed to be responsible for this act of terror? celebrate your love of crab with gthis year's largest variety!. 'cause it's crabfest at red lobster! dig into a succulent selection of crab entrées. like new crab lover's trio! with sweet snow crab legs, split king crab, and jumbo lump crab over savory shrimp. crab three ways! all on one plate. or try new jumbo lump crab over wood-grilled salmon. experience crabfest at red lobster today. only for a limited time. come in and sea food differently! intercourse that's painfulit... due to menopausal changes.