Economics Insights @ CBS

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).

The authors study global adoption processes where the units of observation are countries, which sequentially adopt a particular technology. The authors’ goal is to provide a better understanding of how exogenous and endogenous country characteristics affect this diffusion process. They develop a general model of global adoption processes, which allows researchers to test extant theories of cross-country adoption, and illustrate the approach using data from the cellular telephone industry for 184 countries.

This paper empirically compares a variety of firm-value-based models of contingent claims. We formulate a general model which nests versions of the models introduced by Merton, 1974; Leland, 1994 and Anderson and Sundaresan, 1996, and Mella-Barral and Perraudin (1997). We estimate these using aggregate time series data for the US corporate bond market, monthly, from August 1970 through December 1996. We find that models fit reasonably well, indicating that variations of leverage and asset volatility account for much of the time-series variations of observed corporate yields.