Chatterji, Pinka; Ho, Chun-Yu; Jin, Tao; Wang, Yichuan - National Bureau of Economic Research - 2024
Since the inception of Medicare Part D in 2006, mergers and acquisitions (M&A) and regulatory changes have led to increased concentration and reduced plan variety in the standalone prescription drug plan (PDP) portion of the market. We examine how this industry consolidation affects Medicare...