“…Rosenberg and Engle (2002), BaroneAdesi, Engle, and Mancini (2008), Barone-Adesi and Dall'O (2010)). Estimation of the riskneutral distribution is by now a well-established field of research and a large literature covers it; see the surveys by Jackwerth (1999), Jackwerth (2004), and Bahra (1997). Given a large enough cross section (more than 10 option strike prices), most methods perform relatively similar and yield the desired risk-neutral distributions where one typically uses the SPX options on the S&P 500 index with typical maturities of 30 to 60 days.…”