Scarcity rents.
wKinds of knowledge inputs.
nExplicit knowledge as a public good.
nTacit and poorly understood routines.
lMay also be linked to specific asset or site.
wCan the innovator replicate the input?
wCan competitors imitate the input?
nPatents and secrecy.
nComplexity and ambiguity.
Distinctive knowledge as a scarce factor.