>> joining me now, publy policy professor at the university of berkley. robert, you made a reference to the international effects of labor. to what extent is this an international phenomenon and the american worker, the price of american labor is in some ways competing with the price of labor in other countries and that drives down the american price? >> there is obviously an effect from globalization but also technological change. not many manufacturing jobs are coming back to the united states because they are being replaced by robotics. technology is also reducing wages for people who don't have the right education, the right connections who are not basically in a position to add