The authors propose a new methodology called the 'coupled-hazard approach' to study
the global diffusion of technological innovations. Beyond its ability to describe
discontinuous diffusion patterns, the method explicitly recognizes the conceptual
difference between the timing of a country's introduction of the new technology (the
so-called implementation stage; Rogers 1983) and the timing of the innovation's full
adoption in the country (the confirmation stage). To illustrate the method, the authors
apply it to the global diffusion of digital telecommunications switches across more
than 160 countries.