A Note Comparing Single-Index Models and Quadratic Programming Models for Farm Planning Under Risk

Single-index models from portfolio theory have previously been adapted for risk efficient farm planning in North America. The potential for using single-index models in farm planning is considered in this paper both theoretically and in the light of two illustrative Australian case studies. It is concluded that single-index models have no significant computational or other advantages over full quadratic programming portfolio selection models for farm planning and may produce relatively poor plans and poor assessments of the risks associated with those plans.