15. The following quote is from Jim Clayton et al.:

Although the continued and increased commitment to real estate of the traditional institutional investor base has contributed to capital flows, helping propel property values, perhaps even more important for the future of the asset class has been the rising importance over the last several years of the second major source of capital inflows: capital sources that have not traditionally been involved in real estate.18

a. What institutional investors comprise the traditional investors in the commercial real estate market?

b. What is the second source of commercial real estate investors?