recent studies have shown that firms that have adopted environmental standards and thosethat have obtained official quality certifications achieve higher labour productivity than firms that have notdone so. unlike previous studies, this paper analyzes the combined effect of implementing environmentalgood practices and obtaining quality certifications on apparent labour productivity using a samp...

he water framework directive of the european union has become a milestone in the water policy for this area. this directive aims to achieve a “good ecological status” of bodies of water in the member states of the european union by 2015. the water framework directive calls for the application of economic principles, economic approaches, tools and instruments. the functions of this economic anal...

â â â  â â  abstract â  the importance of community's health followed by the consideration of endogenous growth models has led to an increase in health expenditure of countries to speed up economic growth and development. this has made the efficiency of health production function to an essential issue especially in developing countries. based upon this, the present study with employing the...

The energy flow characteristics of Combined Cooling, Heating and Power (CCHP) system are analyzed in detail and the energy flow function is proposed for its two operational strategies: thermal load dominant mode and electrical load dominant mode. In order to improve its economic and environmental efficiency, an optimal economic and environmental dispatch model is built, which includes the fuel ...

in this study, yield-water and profit function was used to obtain water demand function in agriculture sector. the results showed that the ratio of actual to potential evapotranspiration had positive, significant effecton the ratio of actual to potential yield for wheat and barley. also, square ratio of actual to potential evapotranspiration had negative, significant relationship. after estimat...

Second-hand smoking (passive smoking or environmental smoke exposure) refers to air inhaled by a nonsmoker that is contaminated by smoke released from a burning cigarette or in the exhaled air of a person smoking a cigarette. More than 4,000 chemicals, including at least 43 known cancer-causing agents, have been identified from environmental smoke.1 In 1993, the United States Environmental Prot...