host: leigh purvis joins us now. the public policy institute, aarp, discussing a new report on prescript and drug prices. most people know what the aarp is. explain what the public policy institute does there. guest: the public policy institute is the aarp's internal think tank. it is our job to take a look at the issues aarp works on and make sure we have policies that help guide our positions and advocacy work. host: an ongoing research on prescription drug prices. they cuss through what your latest report looked into. guest: this report as part of an ongoing series. our latest report focus on specialty prescription drugs, more specifically 97 widely used specialty prescription drugs, and we found on average there price increased at three times the rate of inflation 2015 -- 2017. host: what's the difference between a specialty and regular drug? guest: specialty's prescription drugs don't have a set definition and are typically --scribed to affect people affect conditions that affect people for the rest of their liv