a measure of the total production of the journal. In this paper, in order to obtain measures of the efficiency in the … on its resources. The efficiency can then be measured by considering the difference between the actual production and the … estimated frontier. This approach is applied to the measurement of the productive efficiency of the journals of the JCR social …

I use a stochastic production frontier to model energy efficiency trends in 85 countries over a 37-year period …. Differences in energy efficiency across countries are modeled as a stochastic function of explanatory variables and I estimate the …. Energy efficiency is measured using a new energy distance function approach. The country using the least energy per unit …

We analyze the market efficiency of 25 commodity futures across various groups—metals, energies, soft commodities …, grains and other agricultural commodities. To do so, we utilize the recently proposed Efficiency Index to find out that the … coffee. On the other end of the ranking scale we find live cattle and feeder cattle. The efficiency is also found to be …

In this paper we analyze the evolution of firm efficiency in the Czech Republic. Using a large panel of more than 190 …,000 Czech firm/years we study whether firms fully utilize their resources, how firm efficiency evolves over time, and how firm … efficiency is determined by ownership structure. We employ a panel version of a stochastic production frontier model for the …

Two of the major problems of heat pump systems working in extreme conditions are the loss of efficiency of the system …

overall system efficiency is equal to 74.9%, 72.3% and 71.0%. In general, the results presented in this study provide a useful …

are provided to find the optimal volume both in terms of thermodynamic efficiency and of economic profit. …

performance (COP) and efficiency of the system was carried out over a range of different hot reservoir temperatures, volumetric … efficiency, η2nd. Losses mapping indicated that friction and thermal leakage to the ambient are the most important contributors … reduction of the cold end thermal parasitic losses are expected to enhance the efficiency of the system. For an operating …

.0–1.8kV, current of ∼28.5A and power of ∼52–86kW. The thermal efficiency of the plasma torch was ∼94–95%. CCD cameras …