Additional utility of insiders with imperfect dynamical information

In this paper we consider a market driven by a Wiener process where there is an insider and a regular trader. The insider has privileged information which has been deformed by an independent noise vanishing as the revelation time approaches. At this time, the information of every trader is the same. We obtain the semimartingale decomposition of the original Wiener process under dynamical enlargement of the filtration, and we prove that if the rate at which the additional noise in the insiders information vanishes is slow enough then there is no arbitrage and the additional utility of the insider is finite.Received: 1 October 2003, Mathematics Subject Classification: 60G48, 90A09, 60H07, 90A60JEL Classification: D82, G11, G14     

Data for outcome payments or information for care? A sociotechnical analysis of the management information system in the implementation of a social impact bond

ABSTRACT

Social Impact Bonds (SIBs) are a policy intervention designed to explicitly link the activity of social interventions to outcome payments. Despite a burgeoning literature on SIBs there is a lack of evidence in relation to the information system characteristics and accounting mechanisms of SIBs. Applying a multi-dimensional sociotechnical lens to a case study of a SIB allows us to reveal the current problematic convergence of public management and information systems. The authors found that an information system within a SIB is introduced and adapted to increasingly prioritize the production of data for payment over documenting care accounts to support improved provision. The ?ndings of this paper also suggest that claims of SIBs as an innovation are limited as they are subject to the familiar problems of New Public Management practice, in the way they shape the design and use of the data in governance, management and service delivery practices.