This paper defines a new concept "bridging telecommunications service" (BTS) in the telecommunication service market. It is a service concept related to the substitution of consecutive generations of telecommunications services. The roles and characteristics of BTS are identified and related...

We propose a framework covering multi-country and multi-generation diffusion processes. Our model focuses on choice-based diffusion model and we extend the model to incorporate heterogeneity of country. We decompose the choice probability for generation into two components; the first one is...

Testing the existence of unit root and/or level change is necessary in order to understand the underlying processes of time series. In many studies carried out so far, the focus was only on a single aspect of unit root and level change, therefore limiting a full assess to the given problems. Our...