people are changing jobs so frequently, and in the my lennial generation, their preference is -- milennial generation, their preference is to live close to where they work. there's this constant maneuvering and job changing in our environment that was quite different than what it was maybe 15 or 20 years ago. that's also causing housing numbers to change as we think about this housing and jobs issue. i do think that the regional issues are really important, and i was struck also by commissioner hillis's comment that essentially two thirds of the housing in the region are being built in three places, essentially, and sort of by design by also where the housing is being accepted. >> commissioner johnson? >> commissioner johnson: hi, yes. so i just want to put a couple other data points behind this. i did a study on this job housing just a few months ago, and so looked at some census data, and looked at new jobs in the nine bay area counties actually exceeded new net migration. it just so happens that those jobs tend to be centered in just a few centers, both san francisco now and also in the