This paper presents a comprehensive framework for describing the diffusion of the Internet in a country. It incorporates insights gained from in-depth studies of about 25 countries undertaken since 1997. The framework characterizes diffusion using six dimensions, defining them in detail, and examines how the six dimensions relate to underlying bodies of theory from the national systems of innov...

T paper studies the cross-country diffusion of personal computers (PCs) and the Internet, and examines how the diffusive interactions across these technologies affect the evolution of the global digital divide. We adopt a generalized diffusion model that incorporates the impact of one technology’s installed base on the diffusion of the other technology. We estimate the model on data from 26 dev...

In urban transportation networks, crime diffuses as criminals travel through the networks and look for illicit opportunities. It is important to first model this diffusion in order to recommend actions or patrol policies to control the diffusion of such crime. Previously, game theory has been used for such patrol policy recommendations, but these applications of game theory for security have no...

Through the adoption of a two-step methodology, this paper sets out to examine the pattern of diffusion of mobile telecommunications with the aim of identifying the key factors influencing the diffusion rate for 29 OECD countries and Taiwan between 1980 and 2001. We find that the pattern of diffusion of mobile telecommunications for all the sample countries is generally characterized by an S-sh...

In the process of urban expansion and development, “asset-heavy invisible” infrastructure construction is playing an increasingly important role, which also makes people realize importance diffusion policies that need collective institutional action among Chinese cities. We examine what drives new underground utility tunnel (UUT) policy with analysis 242 prefecture-level cities in China. The re...

In federal systems, governments have the opportunity to learn from the policy experiments – and the potential successes – of other governments. Whether they seize such opportunities, however, may depend on the expertise or past experiences of policymakers. Based on an analysis of a dataset on state-level adoptions of youth access antismoking adoptions, we find that states are more likely to emu...

Spending on antipsychotic medications continues to escalate as new products such as atypicals are increasingly used to treat schizophrenia and other conditions. Given that per person spending on behavioral health benefits is shrinking while spending on pharmaceutical products is increasing, the psychotropic portion of mental health expenditures is likely to continue to increase in the future. T...