studies on vegetation changes of rangelands under grazed and non-grazedconditions are of great importance in the range management planning programs. to determinethe change process of vegetation, this study was performed in inche shorezar site of golestanprovince for nine years (1997-2005). the vegetation parameters were measured every year inseveral fixed plots inside and adjacent of exclosures...

the performance of a supply chain can be evaluated in either a cross-sectional or a time series manner, and data envelopment analysis is a useful method for both types of evaluation. in this paper we develop an index and indicator of productivity change that can be used with radial and non-radial models for supply chain malmquist index. the supply chain malmquist productivity index (scmpi) can ...

By using the stochastic frontier methodology, this study investigates the technical efficiency and total factor productivity (TFP) growth in Indonesian provincial economies during the period from 1993 to 2000. In addition to the estimation of provincial technical efficiency, factors that contribute to technical inefficiency are also examined and the TFP growth is decomposed into technological p...

Todays health care institutions will undergo major changes in the next two decades. The reason for this is the change of ageing structure in many industrialized countries. In Germany statistics indicate that the costs for health care systems will at least double per person while the number of contributing, working citizens will significantly lower. At the same time average life expectation will...

Logical models of legal reasoning often assume that norms give a complete description of their applicability conditions, an assumption which is too strong, due to the complexities and dynamics of the world. Norms cannot take into account all the possible conditions where they should or should not be applied, first of all because the legislator cannot consider all the possible contexts which are...

today the term globalization is associated with concepts such as unity of economies and societies, the merging of civilizations, of manufacturing and trading companies with banks, change of customs’ policies, increase of trading relations, development of cultural and diplomatic relations, worries of developing countries. globalization is in the best interests of a country if that country has fu...

Most of the currently experienced global environmental changes (rising atmospheric CO2 concentrations, warming, altered amount and pattern of precipitation, and increased nutrient load) directly or indirectly affect ecosystem surface energy balance and plant transpiration. As a consequence, the relative humidity of the air surrounding the vegetation changes, thus creating a feedback loop whose ...

This article applies recent advances in productivity and efficiency measurement to the evaluation of skillbiased technical change. Using the general index approach we are able to establish an explicit and unconstrained time path for nonneutral technical change between production and nonproduction labor in U.S. manufacturing industries over the 1959-1996 period. Our findings confirm the prevaili...