Traffic congestion contributes to longer travel times and increased travel time variability. We account for the dynamic nature of travellers' choices, by deriving a closed-form solution for the costs of travel time variability. The resulting travel delay cost function is linear in the mean...

Likelihood functions of spatial autoregressive models with normal but heteroskedastic disturbances have been already derived [Anselin (1988, ch.6)]. But there is no implementation for maximum likelihood estimation of these likelihood functions in general (heteroskedastic disturbances) cases....

Electrical power generated from the wind’s motion is one of the most common clean and renewable energy produced. The wind turbines used to convert wind mechanical power to electricity have to be placed at a site presenting favorable conditions. This work focuses on finding an accurate method...

This study basically focuses on the analysis of the net effect of the government R&D support program on the local firms' technology development and its performance. And then it examines whether and how much R&D raises the effects of local firms' technology development and its performance. It...

Social welfare is a major issue in both developing and developed countries, including Korea. Political parties are especially struggling with the choice between universal or selective welfare but hardly any clear guidelines exist. This paper reviews universal versus selective welfare concepts...