A longstanding challenge of financial planning has been the fact that its value is usually defined in intangible terms (e.g., "bringing peace of mind") or at least over time horizons too long to effectively evaluate (e.g., "helping people achieve their long-term goals"). Yet arguably, the value of financial planning could be better quantified, by trying to measure how much economically better off clients are by engaging in financial planning strategies than what they would have otherwise done.
And in a recent research paper entitled "Alpha, Beta, and Now... Gamma" David Blanchett and Paul Kaplan of Morningstar have attempted to do exactly this - evaluating how the financial outcomes of retirees are improved by engaging in five financial planning strategies, from more effective asset allocation to dynamic withdrawal rate spending approaches to proper asset location decisions.
Quantifying the difference between the baseline and financial-planning-optimal strategies as "Gamma", Blanchett and Kaplan find that good financial planning decisions increase retirement income by 29%, which is the equivalent of generating 1.82%/year of higher returns. Although there are some important caveats to the research, the new Morningstar paper may open the door to a wave of new research attempting to measure the "Gamma" of good financial planning.