we need longtudinial data, we have hardly any so it's difficult to access what's going on with immigration, what the impact is on wages and employment, it's really tough. what that does is it divorces what's actually happened and pushes lobby groups to disempower my grant workers. before we go to the room, we do have a question on line and it's for daniel, the great construction dispute. she asks construction industry employers are having hard time of having workers, besides increasing wages what else can these em employers do to attract more native-born workers to occupation? >> training and aparen -- apprenticeship has increased over the years. that's really it. that's something that's really completed neglected. >> do we have questions in the room? right here. we have the mic coming. if you could just say your name and affiliation and make sure to ask a question in a period of time. >> ii went to post naval graduate schools. where are the jobs? i met with a young man who works for silicon valley, didn't go to college and earns a hundred thousand dollars and i said what's your job, he sa