The incomplete transformation of institutions of economic policy: from clientelism to competition?

Economic policy in Turkey has gone through significant amount of transformation in the last three decades. While Turkey used to be a closed economy governed by an import-substitution industrialization strategy, starting in the early 1980s it went through substantial liberalization and privatization, and the market mechanism has gained increased importance in the allocation o

A Formal Model for Trust in Dynamic Networks

We propose a formal model of trust informed by the Global Computing scenario and focusing on the aspects of trust formation, evolution, and propagation. The model is based on a novel notion of trust structures which, building on concepts from trust management and domain theory, feature at the same time a trust and an information partial order

Refinement for Administrative Policies

Flexibility of management is an important requisite for access control systems as it allows users to adapt the access control system in accordance with practical requirements. This paper builds on earlier work where we defined administrative policies for a general class of RBAC models. We present a formal definition of administrative refinnement and we show that there is an ordering for administrative privileges which yields administrative refinements of policies. We argue (by giving an example) that this privilege ordering can be very useful in practice, and we prove that the privilege ordering is tractable