There's a lot of research on deterrent strategies, which is why it's kind of bewildering sometimes that the conversation in washingtona policy can be totally divorced from things that academics who study this have known for a really long time. The biggest indicator of whether some one is going to come to the united states or not - economic circumstances. Public safety and just the prevalence of violence and insecurity is, of course, huge for people. And it's far more significant than whatever deterrent strategy one white house or another,. you know, is cooking up on any given day. There is some evidence that on an individual level, you know, a specific person who's caught crossing the border illegally and is