I study how the relative efficiency of high- and low-skill labor varies across countries. Using microdata for countries at different stages development, document that differences in quantities wages are consistent with high-skill workers being relatively more productive rich exploit variation skill premia foreign-educated migrants to discriminate between two possible drivers this pattern: cross...

to comparison the photosynthetic parameters and leaf chlorophyll content and fluorescence of safflower (carthamus tinctorios l.) cultivars under salinity stress, a pot experiment was carried out as factorial based on completely randomized design with three replications in summer 2011 in university of yasouj. first factor included four salinity levels (zero, 75, 150 and 225 mm (formed as 20 to 1...

the aim of this research was to measure the relative efficiency of forest management plans in north of iran. in order to fulfill the research, data of 12 forest management plans were collected from the financial balance sheets of shafaroud forest company during a ten years period. first of all, basic data envelopment analysis (dea) models (bcc and ccr) were used to determine the efficiency. the...

T ourism is one of the most invaluable industries in the world, attracting millions of foreign tourists every year. In terms of historical and cultural attractions, Iran is among top 10 countries, however, it has a small share of foreign tourist's arrival. Iran's tourism boom depends on providing the suitable conditions for the arrival of tourists, included service elements (i.e. hot...