In this paper I re-examine the effect of shelf registration (SEC Rule
415) on the underwriter fees of firms issuing equity. The data indicat
e that lower fees cannot be obtained by typical firms using the shelf
procedure. Rather, previously documented evidence of lower underwriter
spreads for shelf issues appears to be due to a selection bias in the
firms choosing shelf registration. These firms enjoy a comparative co
st advantage over other firms regardless of the registration procedure
used.