In an exemplary embodiment, {HEAD ~ users} of {TAIL ~ the system} are provided with a list of n firms 
of
In an exemplary embodiment , { HEAD ~ users } of { TAIL ~ the system } are provided with a list of n firms
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH