The Effects of Energy Price Adjustment on Macroeconomic Variables: Structural Vector Auto Regressive approach 
                        
                        
                        
                        
                        Analysis of Effective Factors Affecting Changes in CO2 Emissions of Power Plants Sector of Iran, 1997-2008
                        
                        
                        
                        
                        Providing an Appropriate Model for Urban Public Sector Finance in Iran (Isfahan Municipality Case Study)