The amount of financial incentives required to stimulate network growth depends on the size of the <italic>critical mass</italic> which, in its turn, depends on the intensity with which network externalities play their role in the diffusion process. The measurement of the strength of network effects and all that...

I present a simple model of determination of the equilibrium size of a network with indirect network externalities. Indirect network externalities can generate complementarity between goods, and then the demand functions for the network good are those of the complementary goods: the result in...