Hallerbach, W.G.P.M.

portfolio return decision value market price stock investment index factor problem investor management attribute distribution journal theory level period dividend security exposure finance nancial model research approach information opportunity example framework performance process component decision maker weight benchmark result alternative volatility preference interest series section hallerbach figure effect equity estimate error approximation variance spronk portfolio opportunity assumption airline analysis context constraint change modelling table future option respect ratio practice month decision problems report selection maker component var decision context score regression order 2003 john wiley sample business