The role of psychological variables is especially emphasised in the psychological theories of savings such as the behavioural life-cycle hypothesis
(Shefrin & Thaler, 1988).
In reaction to this counterintuitive idea, Thaler and his colleague Hersh Sheffrin proposed the "behavioral life-cycle hypothesis
," in which consumption depends both on one's mental accounts and on one's lifetime wealth.
Their results provide mixed support for the life-cycle hypothesis
and the permanent income hypothesis, and are consistent with the existence of inertia or persistence in household saving behavior.
When the researchers analyzed data from the entire set of respondents at any one point in time, they found evidence of what is called the simple life-cycle hypothesis
: Credit card debt increases at younger ages, peaks at Middle Ages and then tapers off at older ages.
Second, according to Albert Ando and Franco Modigliani's life-cycle hypothesis
, individuals spread their lifetime consumption over the span of their lives by accumulating savings during earning years and maintaining consumption levels during retirement.
The objective of this paper is to provide a sound theoretical framework for the empirical analysis of consumer indebtedness, by integrating Portfolio theory with the Life-Cycle hypothesis
(LCH) model of consumption.
After describing the economic legacy of Ando, contributors offer their research on the age-saving profile and the life-cycle hypothesis
, estimates of wealth effects of capital gains on Italian households, demographic and economic changes at the personal level in Italy, the question of whether the elderly save inappropriately in Japan, robust monetary policy, the euro and the transmission of monetary policy, monetary and fiscal policy in a liquidity trap, non-affine structure and systematic risk sources in generalized duration, the over-investment hypothesis, designing indexed units of account, land prices and business fixed investments in Japan, and, in closing, rationality, behavior and switching idiosyncrasies in the euro-dollar exchange rate.
Another area of Modigliani's fundamental contribution to economics is his life-cycle hypothesis
of the consumption function.
The results support the life-cycle hypothesis
Modigliani, "The Life-Cycle Hypothesis
of Saving: Aggregate Implications and Tests," American Economic Review, vol.
One possible explanation may be life-cycle hypothesis
. Given that the demographics of the United States clearly show an aging population, less would be saved, and more saving would be spent to support retirement, and/or elderly consumption.