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Asset pricing with limited risk sharing and heterogeneous agents

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We develop a model with incomplete markets and heterogeneous agents that generates a large equity premium, while simultaneously matching stock market participation and individual asset holdings. The high risk-premium is driven by incomplete risk sharing among stockholders, which results from the combination of aggregate uncertainty, borrowing constraints, and a (realistically) calibrated life-cycle earnings profile subject to idiosyncratic shocks. We show that it is challenging to simultaneously match asset pricing moments and individual portfolio decisions, while limited participation has a negligible impact on the risk-premium, contrary to the results of models where it is imposed exogenously.

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en

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http://eprints.lse.ac.uk/4820/

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