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Prof. Andreas Ortmann

The University of New South Wales (UNSW) Sydney, Australia

Authors: Jade Wong, Andreas Ortmann, and Alberto Motta

Abstract: Policy-makers world-wide have proposed a new contract – the “social impact bond” (SIB) – which they claim can allay the underperformance and underfunding afflicting not-for-profit sectors, by tying the private returns of (social) investors to the success of social programs (Bolton 2010; Bolton & Savell 2010; Mulgan et al. 2010; Liebman 2011; Von Glahn & Whistler 2011; Tierney & Fleishman 2011). Given the high hopes various governments (in England, Australia, and New York, for example) have pinned on this contract format, and the considerable amount of money that is currently poured, or expected to be poured, into this emerging market, we test this new contact by way of experimental methods. We report an experimental investigation of how SIBs perform in a first-best world, where investors are rational and able to obtain hard information about not-for-profits’ performance. To this end, we use a principal-agent multi-tasking framework to compare SIBs to inputs-based (IBs) and performance-based (PBs) contracts, which arguably represent the most commonly used contracts between governments and not-for-profits. IBs contain a piece-rate mechanism, PBs contain a non-binding bonus mechanism, and SIBs contain a full enforceability mechanism, due to the presence of an investor. Although SIBs can perfectly enforce good behavior, they also require the principal (i.e. government) to relinquish control over the agent’s (i.e. not-for-profit’s) payoff to a self-regarding investor, which prevents the principal and agent from being reciprocal. In spite of these drawbacks, in our experiment SIBs outperformed IBs and PBs. We therefore conclude that, at least in our laboratory test-bed, SIBs can allay the underperformance problem in a first-best world.

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