The introduction of GNSS as primary mean of aircraft navigation calls for a rationalization of existing ground-based assistance networks. Several studies indicate the DME as the possible back-up solution, and therefore the only radio assistance to be maintained. The paper proposes an algorithm...

This paper proposes a theory of long-run development based on public infrastructure as the engine of growth. The government, in addition to investing in infrastructure, spends on health services, which in turn raise labor productivity and lower the rate of time preference. Infrastructure affects...

The migration to Next Generation Networks (NGNs) has significant implications for the technical architecture and design of (access and core) network infrastructure, and also for the value chains and business models of electronic communications service provision. The nature and scope of...