Since Ohlson (1995), a number of refinements of the basic RIM have been suggested.
Many of these studies have both pedagogical and research apphcations. The Feltham
and Ohlson (1995) analysis, in particular, proposes a separation between the net operating
assets and the net financial assets of the firm that is important in the presence of
conservative accounting. This separation also has intuitive pedagogical appeal. Other
recent studies that have extended various aspects of valuation theory include Feltham
and Ohlson (1996,1998), Ohlson and Zhang (1998), and Zhang (1998).