of the consumer's asset holdings indeterminate, but each stationary point has a continuum of dynamic paths converging to it. The savings policy rules underlying these dynamic paths are step functions.

The use of models in guidelines making may bereaching a kind of inflection point, based on the evolution of 2 separate—but coincidentally con-verging—lines of work in the fields of guidelines making and model building. The result will be improved transparency about the differences among guidelines

decisions increases the fluctuations of output about the normal employment level. But proper use of a feedback monetary policy rule can reduce these fluctuations even though expectations are rational and people know the policy rule. I t is noted that use of a rule-dictated policy sometimes requires

(2002). A Taylor rule ensures convergence to the rational expectations equilibrium associated with this policy if the so-called Taylor principle is satisfied. This suggests the Taylor rule to be de-sirable from the point of view of eliminating instability due to self-fulfilling expectations.

. We contrast the usability/privacy/security properties of our design with other identity management/authentication schemes deployed or being proposed today. Our design is truly user-centric, in the sense that the user acts as his own CA, and as a decision point for authorizing release of user

in coding new ones. The framework is based on the IETF approach for policies, which helps in the dissemination of the IETF view of policies.

to address heterogeneous resource capabilities, temporal variations in those capabilities have seldom been considered. We propose a conservative scheduling policy that uses information about expected future variance in resource capabilities to produce more efficient data mapping decisions. We first present

Does student aid increase college attendance or simply subsidize costs for infra-marginal students? Settling the question empirically is a challenge, because aid is correlated with many characteristics that influence educational investment decisions. A shift in financial aid policy that affects

The aim of this paper is to provide a conceptual basis for the systematic treatment of uncertainty in model-based decision support activities such as policy analysis, integrated assessment and risk assessment. It focuses on the uncertainty perceived from the point of view of those providing

reliance on networks as the key feature of social morphology. While networks are old forms of social organization, they are now empowered by new information/communication technologies, so that they become able to cope at the same time with exible decentralization, and with focused decision