Trust, opportunism and governance

The paper considers a (static) portfolio system that satisfies adding-up contraints and the gross substitution theorem. The paper shows the relationship of the two conditions to the weak dominant diagonal property of the matrix of interest rate elasticities. This enables to investigate the impact of simultaneous changes in interest rates on the asset demands.

Will opportunism go away

This paper introduces a general, formal treatment of dynamic constraints, i.e., constraints on the state changes that are allowed in a given state space. Such dynamic constraints can be seen as representations of "real world" constraints in a managerial context. The notions of transition, reversible and irreversible transition, and transition relation will be introduced. The link with Kripke models (for modal logics) is also made explicit. Several (subtle) examples of dynamic constraints will be given. Some important classes of dynamic constraints in a database context will be identified, e.g. various forms of cumulativity, non-decreasing values, constraints on initial and final values, life cycles, changing life cycles, and transition and constant dependencies. Several properties of these dependencies will be treated. For instance, it turns out that functional dependencies can be considered as "degenerated" transition dependencies. Also, the distinction between primary keys and alternate keys is reexamined, from a dynamic point of view.

Cost, quality and learning based governance of transactions : Western, Japanese and a third way

The paper considers a (static) portfolio system that satisfies adding-up contraints and the gross substitution theorem. The paper shows the relationship of the two conditions to the weak dominant diagonal property of the matrix of interest rate elasticities. This enables to investigate the impact of simultaneous changes in interest rates on the asset demands.

Entrepreneurship, Innovation and Institutions

This paper discusses the nature of entrepreneurship and its relation to innovation along a cycle in which exploration and exploration follow upon each other. We place the roles of entrepreneurship in innovation policy within this cycle of innovation. Different types of innovation along the cycle of innovation are realized with different forms of entrepreneurship, which are constrained or enabled by different legal institutions. One of the key roles of governments is to design, change or destruct institutions in order to improve societal welfare. The question is what governments should do in the context of innovation policy. Here, social scientists can make a contribution by providing insight into what entrepreneurship and innovation is (theories about these phenomena), and how institutions affect them in reality (empirical evidence about their effects). This requires social scientists to be engaged scholars and to provide new policy options as an honest broker between the academic world and the policy world. The key question of this paper is: How can policy best enable innovation based entrepreneurship? The answer is derived from looking at both theoretical tenets and empirical evidence using an institutional design perspective, which aims at providing arguments for the design, change and/or destruction of institutions, given the goals of the governments. We provide an overview of some (empirically tests of) institutions that enable or restrain particular types of entrepreneurship. Examples of these institutions are intellectual property rights and the Small Business Innovation Research program, employment protection, and non-compete covenants.entrepreneurship, innovation, institutions, innovation policy

Market partitioning and the geometry of the resource space

Operations such as integration or modularization of databases can be considered as operations on database universes. This paper describes some operations on database universes. Formally, a database universe is a special kind of table. It turns out that various operations on tables constitute interesting operations on database universes as well.