In this research, performance of portfolios formed by use of grid strategy based on new variables (aggressive, indifference and defensive stocks) presented by Rahnamaye Roodposhti (1388), and traditional ones (growth, growth-value and value stocks), calculated with Sharpe and Treynor performance measures and tested by an Active portfolio management approach to identify the portfolios by perform...

human resource productivity is an important subject in theory and practice, so increase of productivity is the first priority in most of organizations. the main purpose of most organizations is creating value for their shareholders. so it is necessary to understand effect of human resource productivity in achieving this goal and find the obstacles. the purpose of this research is examining the ...

To counteract the negative publicity derived from environmental impacts and avoid.potential “greenwashing” accusations, hotels resort to third-party entities certify their commitment environment. The objective of this study is analyze effect certifications on hotels’ market value. fill gap in literature, empirical detects all announcements awards ever made by major publicly traded United States...