Recent studies have explored the possibility that accounting for limited participation in financial markets, and in the stock market in particular, might rationalize the empirical inconsistency of the Consumption-based Capital Asset Pricing Model (C-CAPM). The rational behind this stand is that if non-shareholdersÂ’ consumption growth co-varies with share returns less than shareholdersÂ’, including their expenditure in the consumption measure used to test the model will be misleading. This paper reviews extensively the implications of household portfolio heterogeneity for various well-known characterizations of the empirical failure of the model, such as the inconsistency of consumption-based asset pricing factors with Hansen and Jagannathan bounds, the equity premium puzzle and the rejection of the overidentifying restrictions to the model. Specifically, it provides a unified framework of analysis, based on the US Consumer Expenditure Survey, to assess to what extent the empirical inconsistency of the C-CAPM can be attributed to the use of aggregate data that do not allow to account for limited participation in asset markets. The evidence from the analysis provides support to the view that accounting for portfolio heterogeneity improves the empirical performance of the model and helps rationalize some of the puzzling findings. However, heterogeneity in financial market participation alone does not appear to be enough to reconcile fully the theory with the empirical evidence.
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Find related papers by JEL classification: E21 - Macroeconomics and Monetary Economics - - Macroeconomics: Consumption, Saving, Production, Employment, and Investment - - - Consumption; Saving; Wealth G12 - Financial Economics - - General Financial Markets - - - Asset Pricing
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