The network may comprise any number of participants, including {HEAD ~ consumers} , {TAIL ~ retailers} , manufacturers, third party providers, and the like 
The network may comprise any number of participants , including { HEAD ~ consumers } , { TAIL ~ retailers } , manufacturers , third party providers , and the like
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH