Retail prices for more than 100 widely used specialty drugs rose nearly 11 percent in 2013, according to a new report from AARP Public Policy Institute. The report found that the average annual cost of a specialty drugs used to treat chronic diseases rose to more than $53,000 — greater than the U.S. median income and more than twice the $23,500 median income of people on Medicare. We spoke to Leigh Purvis, director of health services research in AARP’s Public Policy Institute about the report, trends that are fueling demand for these drugs, and whether there are public policy solutions to rein in rising drug prices that can be implemented without harm to innovation.