To measure the IPv6 internet AS-level topology, a network topology discovery system, called Dolphin, was developed. By comparing the measurement result of Dolphin with that of CAIDA’s Scamper, it was found that the IPv6 Internet at AS level, similar to other complex networks, is also...

As a significant factor in urban planning, traffic forecasting and prediction of epidemics, modeling patterns of human mobility draws intensive attention from researchers for decades. Power-law distribution and its variations are observed from quite a few real-world human mobility datasets such...

There is currently considerable discussion between governments, international agencies, bilateral donors and advocacy groups on whether user fees levied at government health facilities in poor countries should be abolished. It is claimed that this would lead to greater access for the poor and...

Objective Rwanda has expanded mutual health insurance considerably in recent years, which has a great potential for making health services more accessible. In this paper, we examine the effect of mutual health insurance (MHI) on utilization of health services and financial risk...

Summarizes the results of three individual research projects measuring the impact of membership in a health insurance scheme in Kenya, Senegal and South Africa.

One of the major challenges for health systems is to ensure that everybody has access to needed care without facing catastrophic payments or impoverishment. Argentina is middle income country that has experienced remarkable transformations in income distribution and inequality in the last...

The effect of a social health insurance on health services utilization and on the total potential incidence of catastrophic health expenditure is explored in this paper. Most previous measures of the incidence of catastrophic health expenditure are quite constrained since they do not take into...

This study examines investors' reaction to managers' use of contrastive words (words that introduce corrective and/or unexpected information) during the question and answer (Q&A) sessions of conference calls. We document evidence that managers' use of contrastive words is an indicator of the...

College students' social network is critical because it could influence students' academic performance, attrition, and even suicide attempt. Unfortunately, the college students' social network is not easy to be collected. The existing methods (e.g., survey, online social network web sites, and...