The brief’s key findings are:
- A new analytical tool tells a clear story of why unfunded liabilities rose during 2001-2013.
 - The primary factor was investment returns that fell short of expectations due to the two financial crises.
 - A secondary factor was that many plans failed to make adequate contributions, a more serious problem among the worst-funded plans.
 - This type of analysis should be added to every plan’s annual actuarial valuation.
 



