here to tell us why, editor at thomson reuters digital, chrystia freeland.lain -- you wrote this fascinating article in which you capture this polarization of the job market and this stratification you are at the very top or very bottom there's nothing in between. >> there is a body of economic research which i think shows what we all see happening around us and is that the impact of technological change is to get rid of the jobs in the middle. routine tasks that computers can do, a classic example is a travel agent. that used to be a pretty reasonable white collar job. when is the last time you used a travel agent -- you still do. >> you know what maybe -- we do, because she's wonderful and we're not going to abandon her. but i understand what you are saying. most people go on to a website and make their own reservations. >> and it is happening in manufacturing manufacturing, and in the legal profession. those jobs are being hollowed out in the middle. the jobs that are left are non-routine manual like collecting the garbage, chopping up onions or the non-r