Much of the technology diffusion research has focused on the “intention to adopt” of an adopting unit to explain its adoption behavior — the opportunity for adoption and the underlying adoption propensity is often not differentiated. However, the “opportunity to adopt” need not be uniform among adopting units. From the perspective of organizational learning, it is argued that the differential opportunity to adopt originates from knowledge barriers and varied access to supply-side institutions that can lower these barriers (Attewell 1992)