. >> jean epstein. institute contributor. what is your assessment of the literature about sea level rise and the economics of it and the potential ris potential risks? >> it's interesting because it's one of the areas where we have the best data where we know something the happening an the worst projections of what that will look like. the evidence that sea level has risen and continues to rise is very good. what that will look like in se 2100, the gold standard u.n. report, their best estimate is about two feet of sea level rise. in the years since then, 2013, 2014, since then, several states have come out and said that's on the low side because we think we might see more activity in a place like antarctica. then you here people say four, five feet of rise over theory. is estimating thing about the cost is that it doesn't tend to show up much in study. some look at sea level rise and the reason it didn't show up is because it's a one-time cost. if it's hotter, you get this number. you say that happens every year forever. wit