in this paper, a model based on gmdh type neural network, is used to predict gas price in the spot market while using oil spot market price, gas spot market price, gas future market price, oil future market price and average temperature of the weather. the results suggest that gmdh neural network model, according to the root mean squared error (rmse) and direction statistics (dstat) statistics ...

This study examines whether patent citation impact, a leading indicator of technology firms’ innovation capabilities, is associated with future earnings and whether this association is appropriately reflected in stock prices and analysts’ earnings forecasts of patent-rich companies. The results indicate that change of patent citation impact is positively associated with future earnings, particu...

Case studies of primary care developments are used as a basis for examining the extent to which a market in primary care is already being put in place in the NHS. This is then followed by a consideration of the implications of such a market for patients, providers and commissioners. We conclude by making the following recommendations: That the use of contestability in primary care has significa...

oil seeds and crude vegetable oil are the raw materials used in vegetable oil producing industry. vegetable oil producing plants in iran are dependent on importing the material in a way that more than 90 percent of these materials are to be imported. soybean oil seed is the main oil seed utilized in the oil producing plants which is procured through importation from other countries. in the worl...