Currently, the Internet service provider market offers two different types of pricing plans. In the USA, the predominant pricing plan is a flat-rate plan. In Europe and Asia, the predominant one is a per-minute pricing plan. Enrolled in such a pricing plan, users have to pay for the connect time to the Internet. Although Internet Service Providers (ISPs) have competed heavily for users in these...

in the current study, the generalized maximum entropy (gme) and dynamic positive equilibrium problem (dpep) approach were introduced and used to estimate the set of dynamic supply functions of selected annual crops in mashhad-chenaran plain during the years 2003-2011.in addition, the allen and morishima elasticities of derived demand inputs, and supply elasticity of the crops were determined. t...

fuzzy water quality index (fwqi) was applied in order to assess the degree of drinking water resources in yazd province, iran. thisstudy has also offered the creation of a new fuzzy water quality index (fwqi) to evaluate this tool’s applicability. 12 chemicalparameters including toxic and non-toxic heavy metals measured in 71 groundwater samples collected from drinking water resourcesin rural a...

as an assessment method of the water resources, water poverty index (wpi) has become an available tool in water resources management. in particular, agricultural water poverty index (awpi) is an assessment tool for agricultural water in rural areas. during the past decades, mahidasht basin in kermanshah province has been declared by water policy makers as “forbidden” basin in terms of water exp...

terminal drought stress during grain filling period has recently become more common in the semiarid mediterranean regions, where wheat (triticum aestivum) is grown as an important winter cereal crop. the objective of this experiment was to study the effect of terminal drought stress on grain yield, gas exchange variables, and some physiological traits of nine bread wheat cultivars. an experimen...

The valuation of Canadian paintings is analyzed empirically. Using a sample of auction prices for major Canadian painters for the period 19682001, we run hedonic regressions to analyze the in‡uence of various factors, including painter identity, on auction prices, as well as to construct a market price index. This index is used in a second stage analysis in which we analyze the properties of Ca...