Following Kocherlakota and Pistaferri (2009), we consider two forms of incomplete risk sharing in economies with consumer heterogeneity: (a) where agents are unable to insure their consumption against idiosyncratic skill shocks and (b) where idiosyncratic shocks to skills can be partially...

This paper proposes a test for common GARCH factors in asset returns. Following Engle and Kozicki (1993), the common GARCH factors property is expressed in terms of testable overidentifying moment restrictions. However, as we show, these moment conditions have a degenerate Jacobian matrix at the...