Determinants of a digital divide in Sub-Saharan Africa : a spatial econometric analysis of cell phone coverage

Most discussions of the digital divide treat it as a"North-South"issue, but the conventional dichotomy doesn't applyto cell phones in Sub-Saharan Africa. Although almost all Sub-Saharan countries are poor by international standards, they exhibit great disparities in coverage by cell telephone systems. Buys, Dasgupta, Thomas and Wheeler investigate the determinants of these disparities with a spatially-disaggregated model that employs locational information for cell-phone towers across over 990,000 4.6-km grid squares in Sub-Saharan Africa. Using probit techniques, a probability model with adjustments for spatial autocorrelation has been estimated that relates the likelihood of cell-tower location within a grid square to potential market size (proximate population); installation and maintenance cost factors related to accessibility (elevation, slope, distance from a main road, distance from the nearest large city); and national competition policy. Probit estimates indicate strong, significant results for the supply-demand variables, and very strong results for the competition policy index. Simulations based on the econometric results suggest that a generalized improvement in competition policy to a level that currently characterizes the best-performing states in Sub-Saharan Africa could lead to huge improvements in cell-phone area coverage for many states currently with poor policy performance, and an overall coverage increase of nearly 100 percent.E-Business,ICT Policy and Strategies,Population Policies,Technology Industry,Geographical Information Systems

The MobiCert Mobile Information Community for Organic Primary Producers: a South Australian Prototype

Mobile technology and m-Commerce are transforming our digital economy to a mobile one, with new markets and mobile services worldwide. Today, the importance of communication and information access in a timely and efficient manner is critical for many industries: particularly those in rural and regional areas, due to their often limited Internet access and mobile coverage. This paper presents the findings of the MobiCert project, which investigated the use of mobile technology to improve communication and information access within one of these rural industries using a Rapid Appraisal approach. As a proof-of-concept project, MobiCert focused the development of a mobile information community for organic primary producers in rural South Australia to improve their stakes in the Mobile Revolution. The extremely positive acceptance of the MobiCert solution by organic primary producers illustrated the significant potential mobile technology has to improve rural farm life in Australia

The Neglected Continent of IS Research: A Research Agenda for Sub-Saharan Africa

Research with a focus on Sub-Saharan Africa (SSA), a major region within the world’s second largest continent, is almost non-existent in mainstream information systems research. Although infrastructures for information and communication technology (ICT) are well established in the more developed and industrialized parts of the world, the same is not true for developing countries. Research on developing countries has been rare in mainstream IS and, even where existent, has often overlooked the particular situation of SSA, home to 33 of the world’s 48 least-developed countries. Ironically, it is such parts of the world that can stand to gain the most from the promise of ICT with applications that would help the socioeconomic development of this region. In this study, we present the need for focused research on the ICT development and application for SSA. The information systems research community has a unique and valuable perspective to bring to the challenges this region faces in developing its ICT infrastructure, hence extending research and practice in ICT diffusion and policy. We present here a research agenda for studying the adoption, development, and application of ICT in SSA. In particular, teledensity, telemedicine, online education, and e-commerce present important areas for research, with implications for research, practice, and teaching

Enabling Censorship Tolerant Networking

Billions of people in the world live under heavy information censorship. We propose a new class of delay tolerant network (DTN), known as a censorship tolerant network (CTN), to counter the growing practice of Internet-based censorship. CTNs should provide strict guarantees on the privacy of both information shared within the network and the identities of network participants. CTN software needs to be publicly available as open source software and run on personal mobile devices with real-world computational, storage, and energy constraints. We show that these simple assumptions and system constraints have a non-obvious impact on the design and implementation of CTNs, and serve to differentiate our system design from previous work. We design data routing within a CTN using a new paradigm: one where nodes operate selfishly to maximize their own utility, make decisions based only on their own observations, and only communicate with nodes they trust. We introduce the Laissez-faire framework, an incentivized approach to CTN routing. Laissez-faire does not mandate any specific routing protocol, but requires that each node implement tit-for-tat by keeping track of the data exchanged with other trusted nodes. We propose several strategies for valuing and retrieving content within a CTN. We build a prototype BlackBerry implementation and conduct both controlled lab and field trials, and show how each strategy adapts to different network conditions. We further demonstrate that, unlike existing approaches to routing, Laissez-faire prevents free-riding. We build an efficient and reliable data transport protocol on top of the Short Message Service (SMS) to serve a control channel for the CTN. We conduct a series of experiments to characterise SMS behaviour under bursty, unconventional workloads. This study examines how variables such as the transmission order, delay between transmissions, the network interface used, and the time-of-day affect the service. We present the design and implementation of our transport protocol. We show that by adapting to the unique channel conditions of SMS we can reduce message overheads by as much as 50\% and increase data throughput by as much as 545% over the approach used by existing applications. A CTN's dependency on opportunistic communication imposes a significant burden on smartphone energy resources. We conduct a large-scale user study to measure the energy consumption characteristics of 20100 smartphone users. Our dataset is two orders of magnitude larger than any previous work. We use this dataset to build the Energy Emulation Toolkit (EET) that allows developers to evaluate the energy consumption requirements of their applications against real users' energy traces. The EET computes the successful execution rate of energy-intensive applications across all users, specific devices, and specific smartphone user-types. We also consider active adaptation to energy constraints. By classifying smartphone users based on their charging characteristics we demonstrate that energy level can be predicted within 72% accuracy a full day in advance, and through an Energy Management Oracle energy intensive applications, such as CTNs, can adapt their execution to maintain the operation of the host device