ap institution is the set of expectations, about people's expectations that exist win a group of people. it's not something that's transmissible by an individual who he arrives. finally, congestion, this is something we don't know much about. it is correct to say, they know very little about the consequences of high levels of immigration. but there's not no information at all. you have singapore, and vancouver with 40%. and, canada with about half the population foreign born. they are not experiencing low levels. it is possible that will other places could be different and much higher levels, things could be different. so, here's what we do in the paper, with just a few minutes that i have left. put together a very simple one sector, two factor molgtd, and ask for a given rate of transmission of total factor productiontorty, from low countries, and asim mill lacing and congestion, and, benching of the transmission curve. do a few pages and fee is you can come up with up with good pressing, for what it offsets the global game. that's the expressing for it. it's, it depends on asim mill l

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ape bring together ideas and just gives us all strength. >> reporter: some ideas will come from frank, the deputy director of wistar institute. >> we would like to go directly to the source of a circulating tumor cell. >> reporter: researching metastatic breast cancer. >> this is one of the pro tense we have discovered here report report looking at row teens they are hoping to first identify markers that allow certain cancer cells to spread to be metastatic. >> second, are any of those markers amenable to drugging. are they druggable target that we can say, let's stop migration process, let's stop it's a built to invade other organs. >> reporter: sometimes it is deadly quickly but not always. that is what makes metastatic community so unique. >> great start, you know, to recognize that we are a separate group and different, i'm a stage four survivor, and that incredible. not everyone gets to say that. >> reporter: debbie is a volunteer for komen helping with the symposium taking place at lowes philadelphia on saturday september 17th. with more information at cbs philly.com/events. i'm stephanie stahl, cbs-3 "eyewitness news". >>> and sti

respect for traditional institutions of government and politics is extreme which is what makes him appealing. this thing looked like he was a guy who didn't care he was not in the ap class. he is not going to study for the exam. he thinks he is right and thinks he is the voice of the people. >> he was taking on lester holt. here's the exchange where secretary got the better of him over policing policies. she seemed to have done her homework on the issue of stop and frisk. >> two minutes are expired, but i want to follow-up stop and frisk was ruled unconstitutional in new york because it largely singled out black and hispanic young men. >> you're wrong. it went before a judge who was a very against police judge. it was taken away from her and our new mayor refused to go forward with the case. if you look at it throughout the country, there are many places. >> the argument is it's a form of racial profiling. >> the argument is we have to take away the guns from those who are bad people. >> it's unfortunate that he painted such a dire negative picture of black communities in our country. the vibrancy of the black church and the black businesses that employ so many pe