I am trying to do a styleanalysis as in Sharpe (1992) paper (Asset allocation: Management Style and Performance Measurement).
There are three different models, unconstrained, constrained and quadratic programmed (Page 7). I am stuck with the quadratic programming model, where the coefficient is to be non-negative. Since we can only specify an equation in the restrict statement, I am wondering if anyone know how to run the regression in SAS?
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