Technical Report A Double Counting Problem in the Theory of Rational Bubbles

Tomura, Hajime

In a standard overlapping generations model, the unique equilibrium price of a Lucas'tree can be decomposed into the present discounted value of dividends and the stationary monetary equilibrium price of fiat money, the latter of which is a rational bubble. Thus, the standard interpretation of a rational bubble as the speculative component in an asset price double-counts the value of pure liquidity that is already part of the fundamental price of an interest-bearing asset.
2012~2016年度科学研究費補助金[基盤研究(S)]「長期デフレの解明」(研究代表者 東京大学経済学研究科・渡辺努, 課題番号:24223003)

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