Not only access to the factors of production - capital, labour and energy - but also substitutability among these factors has a strong influence on how economies change and evolve. Numerous studies have considered interfactor substitution for industrial countries. But, since only a few have been...

Ongoing changes in the US electricity market include restructuring and increased competition. With this unfettering of the market, the fuel choice in generation is expected to become more flexible and responsive. To investigate this hypothesis, studies of US electricity fuel choices over the...

We present a simple mathematical model for the Twitter dynamics, and use the model to extract the information-sharing tendencies on two time scales, day and hour, about three contenders in the 2012 presidential election in South Korea. Comparison of the model results with actual data...