"god bless you," the voice says, as a supermarket worker pushes a trolley of sugar towards anxious shoppers. they scramble to grab as much as they can before supplies run out. pleas from russian officials for the public not to panic buy are going unheard. and now a prominent russian economist tells cnn this economic pain is set to deepen. >> we're seeing these shortages now, and that's bad enough for some people in russia. but what you're saying is that soon, we could see a much bigger, much more serious economic impact because of these sanctions. >> yes. the shortages, it's a temporary -- most of the shortages, it's a temporary problem. so that will be solved. these goods will appear. it's a very acute phase, and then everything is phase. with the quality of life, real income, that is not that apparent yet, but that will be -- this problem will be