The Millennium Development Goals by the United Nations included a global target for Improved Water Source to reach 88% of global population by 2015. By 2010, the global target was reached. However, there are still millions of people lacking the improved access to drinking water. We propose the...

Past projections of wind-powered electricity by several organizations including Energy Information Administration have been too conservative in the past. We generate alternative projections for China, the U.S., India, Canada, Japan and South Korea and compare them against the projections made by...

One of the important unresolved questions on the analysis of urban traffic congestion deals with urban congestion penalty versus advantage. This research with examine whether larger cities experience disproportionately greater traffic congestion by using data available from Tom Tom for 164...

Using yearly nitrogen dioxide pollution measures in parts per billion for 179 countries during 1979 to 2011, this research examines whether the convergence process of catch-ups has taken place among countries in both total as well as in multiple subgroups of countries. All four income subgroups...

Since 1990, 2.1 billion people in the world gained access to improved sanitation. However, 2.4 billion people still do not use a basic toilet. We examine whether the country differences in the sanitation index existing in 1990 has been reduced and if so, how fast. We deploy the convergence...

We examine the scaling relationship between the number of patents granted and the population size of individual states in the U.S. over the period of 1992-2010. We find an increasing return to scale or superlinear relationship for the total sample of 50 states. And this relationship is...

The Energy Information Administration (EIA) of the U.S. Department of Energy has projected net electricity generation through 2040 for ten selected countries and the world. These ten countries including China and the U.S. are projected to produce 70% of the world electricity generation. Some of...