austan goolsbee, a professor at the university of chicago's booth school of business, and tyler goodspeedver institution fellow. austan, in the old days, i always thought that were you on the low end of how many jobs we going to add did this surprise you today? >> it totally surprised me this is a jaw-dropping number. there has never been a time when we got the unemployment rate down this low, where we're adding 500,000 jobs. i thought that, given all the rate increases, that we would probably have a disappointment or a miss. you are never going to hear me criticize a jobs number where we got a half million jobs. i would highlight there are two areas of not weakness but danger the first is, if you've got gdp shrinking when you're adding jobs at this kind of rate, it has to mean that productivity's going down and if productivity's going down, what that's going to imply for wages is not great and so you, you probably are going to see a continuation of this kind of negative real wage growth but the second thing is it is fundamentally not stable there are not enough people to keep adding 500,