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Wealth elasticity of demand in microeconomics is the proportional change in the consumption of a good relative to a change in consumers' wealth (as distinct from changes in personal income). Measuring and accounting for the variability in this elasticity is a continuing problem in behavioral finance and consumer theory. ==Definition== The wealth elasticity of consumption quantity for some good will determine the size of the expenditure shift due to ''unexpected'' changes in net personal wealth, ''ceteris paribus'' (i.e. the size of the so-called "wealth effect" for a given good). This is analogous to the definition of the income effect from the income elasticity of demand, or the substitution effect from the price elasticity. The measure of "wealth" is mostly taken to be total personal realizable wealth at market prices, liquid or not: :Wealth = cash balances + government bonds + housing equity + stocks + other assets - debt Some economists say that bonds are simply a loan from the government and that they are not considered (on the aggregate) to be part of net wealth. Generally, the wealth change is measured in real terms. It may seem obvious that an unanticipated windfall will lead to greater consumption and that a fiscal loss will have the opposite effect. However, when the stock markets crashed in April 2000 (wiping out $2.1 trillion in nominal investor wealth) U.S. household consumption did not drop substantially. Some researchers have tried to resolve this difficulty by redefining wealth as the 'stable underlying value' of assets, which doesn't change with asset values, although this raises other questions of consumer rationality. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Wealth elasticity of demand」の詳細全文を読む スポンサード リンク
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