AVERAGE INCOMES in the world's richest countries are more than ten times as high as in the world's poorest countries. It is apparent to anyone who travels the world that these large differences in income lead to large differences in the quality of life. Less apparent are the reasons for these differences. What is it about the United States, Japan, and Germany that makes these countries so much ...

Introduction: Among the United Arab Emirates (UAE) population more and more people now consider travelling abroad. This is potentially problematic because travelling enhances exposure between hosts and pathogens and so people that travel are putting their health at risk. This concern makes it necessary that public education is provided to inform people of the risks of travellin...

• We distinguish attitudes and reasons in the context of residential self-selection. Reasons are more direct indicators location choice than attitudes. have stronger negative effect on use other modes find evidence for multiple bidirectional causal relations. Compared to car bike, public transport is affected by built environment. Residential self-selection (RSS) theoretical mechanism that expl...

TO THE EDITOR—We read with great interest the article by Chen et al in Clinical Infectious Diseases on 15 December 2013 [1] and would like to bring some additional points to the readers’ attention. Chen et al report an increase in numbers of medical tourists from developed countries traveling overseas to obtain more affordable medical procedures and highlight the risk of unusual resistant hospi...