... 2004).Because of this, the meta design contains the costs of the adoption of a communication product, the stand-alone utility, and network effects. The subdesign, on the other hand, is used to analyze the structure ... represents the degree of the installedbase, for which the utility of a communication productcorresponds to the costs that result from the adoption of the product; this means that the net utility of the communication ... independent from its installedbase. The costs of the adoption are created mainly by the price, both of the purchase and the use of the product. Thus, the critical threshold value represents the installed...