Conclusion In some respects, my talk today has been a financial regulator’s wish list for research at the intersection of IO and finance, intended as a complement to the formidable finance research agenda that has already been generated and is on display at this conference.
Some of the items on this list – such as the scale and scope economies issue – are of clear and  5  Wolf Wagner (2010), “Diversification at Financial Institutions and Systemic Crises,” Journal of Financial Intermediation, vol.19 (July), pp. 373–86. 6  See Daniel K. Tarullo (2011), “Regulating Systemic Risk,” remarks delivered at the 2011 Credit Markets Symposium, Charlotte, NC, March 31.