Return on investment is a driving force that motivates and is a reward for investors. Investment returns are important for investors, in order for the entire investment game to be realized. Evaluating efficiency is the only logical way (Before risk assessment) that investors can do to compare alternative and different investments. Measuring real returns (relative to the past) is needed to bette...

drought is universal phenomenon that can occur everywhere and can cause harmful impacts on human beings and natural ecosystems. thus, it is very important to study drought character ristics part of for water resources management. in this study, the standardized precipitation index (spi) is used for drought frequency analysis in isfahan province. after collecting the precipitation data in the pr...

the main purpose of this research paper is to calculate irans housing (maskan) bank through the use of data envelopment analysis. in this research, the performance of 33 branches of the housing bank throughout tehran (capital city of iran) within 2002-2004 was analyzed and discussed. the results of the study shows that average technical efficiencies of housing bank branches in two hypotheses of...

the main purpose of this paper is to evaluating the effects of some methodological problems and issues on the estimates of return rate of education to achieve accurate and reliable figures. after intensively and critically reviewing the empirical studies, opportunity cost, selectivity and endogeneity and the hierarchical structure of data have been recognized as critical problems and issues dom...

the purpose of this study is to investigate the relationship between free cash flows and stock return considering managers' myopia. two hypotheses have been designed and tested, selecting 96 firms from accepted companies in the tehran stock exchange for six-year period from 2005 to 2010 and using stock return for three years ahead (to 2012). the results show that free cash flows are negati...