erik brynjolfsson is to my left and andrew mcafee who are business researchers at the mit school of management and erik is the director at the school of business and andrew is the principle research scientist. they made a name for themselves a couple years ago with their self-published book. it brought up emerging nervousness about the fact that automation is beginning to replace jobs at higher and higher levels. they followed this up with a bigger book "the second machine age: work, progress, and prosperity in a time of brilliant technologies" and it is really, i think, everybody in the room will say how timely this is in the san francisco and the greater bay area there is a lot of tension about both how the tech economy is changing everybody's lives and where we are headed from there. the book directly tackles the promise of technology and some potential challenges it poses. i think both would like to start with questions before giving a brief summary of their views and that is what the second machine age is all about. >> why don't i start and say the book got started from confusion that bot

erik brynjolfsson is to my left and andrew mcafee who are business researchers at the mit school of management and erik is the director at the school of business and andrew is the principle research scientist. they made a name for themselves a couple years ago with their self-published book. it brought up emerging nervousness about the fact that automation is beginning to replace jobs at higher and higher levels. they followed this up with a bigger book "the second machine age: work, progress, and prosperity in a time of brilliant technologies" and it is really, i think, everybody in the room will say how timely this is in the san francisco and the greater bay area there is a lot of tension about both how the tech economy is changing everybody's lives and where we are headed from there. the book directly tackles the promise of technology and some potential challenges it poses. i think both would like to start with questions before giving a brief summary of their views and that is what the second machine age is all about. >> why don't i start and say the book got started from confusion that bot

>> this is the commonwealth club of california program and we are talking with erik brynjolfsson and andrew mcafee about their new book "the second machine age: work, progress, and prosperity in a time of brilliant technologies" and i am your moderator drew leonard. you can hear this on the radio or see videos online on our youtube channel. a couple questions about what you think of basic guaranteed income as a response to the issue which seems to be the opposite of a negative tax. >> they are very closely related. let me build on what andrew was saying. we think you can reallocate the way income is divided. but andy and i focus on an expanded earned income tax credit. they are both ways of getting income to the hands of people and some who haven't benefited as much from the technology. we have been convinced, first a quote we came across from a company that says work solves three great evils, work and it is about a sense of other val values. and bob putnam a great socialogist provide evidence that when work leaves a community it doesn't just take out money but it leads to increase d