Formulation of optimal regulation of asset-backed securities (ABS) markets has been hindered by the inability to identify specific market failures as well as the absence of well-defined social welfare objectives. In our paper, Skin in the Game and Moral Hazard, which was recently presented at Harvard University, we develop a tractable framework for analyzing social welfare in both regulated and unregulated ABS markets, accounting for moral hazard at the origination stage, private information at the distribution stage, and asymmetric information across ABS investors. We show originators operating in unregulated markets fail to internalize the costs they impose on investors if they utilize a common ABS structure (e.g. zero retentions) rather than credibly signaling positive information to the market via higher retentions. Further, originator effort incentives are reduced since those developing high value assets must either signal via high retentions or otherwise face underpricing of their securities. Mandated retentions have the potential to raise welfare by increasing originator effort incentives in an efficient way, accounting for investor-level spillovers.
The first important policy implication to emerge from the model is that regulators must choose between a “one-size scheme” under which all originators are forced to hold the same retention size (e.g. 5%) or a “menu scheme” under which originators must choose amongst multiple retention sizes (e.g. 4% or 8%). Both schemes can restore effort incentives. However, the menu scheme carries the added social benefit of allowing originators to signal positive information to investors via the choice of a larger retention. Signaling promotes efficient sharing of risks by mitigating the adverse selection problem confronting uninformed ABS investors. The weakness of the menu scheme is that it generally results in higher average retentions, resulting in lower originator fundraising.





