Although researchers have shown that purchasing longevity insurance at retirement guarantees pensioners of a high annual income for the rest of their lives, most retirees (who have a choice) choose to take the lump sum and self-manage the portfolio. This is a long-standing puzzle called the...

In recent years, the deferred annuity has aroused intensive discussion as a retirement solution product. In the course of understanding reasons behind the low demand of immediate annuities, two behavioural models, cumulative prospect theory and the hyperbolic discount model, have suggested that...