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What Turns Knowledge into Innovative Products? The Role of Entrepreneurship and Knowledge Spillovers

Block, Joern H.; Thurik, Roy; Zhou, Zhou, H. - Erasmus Research Institute of Management (ERIM), … - 2009

entrepreneurship with respect to economic performance. This paper uses the knowledge spillover theory to explain different innovation …-to-the-market innovation but has no effect on the relationship between knowledge and new-to-the-firm innovation. Our results using European … chances that knowledge will become new-to-the-market innovation. The findings highlight the importance of Schumpeterian …

Persistent link: https://www.econbiz.de/10010730854

Blue Ocean versus Competitive Strategy: Theory and Evidence

van Stel, André; Thurik, Roy; Burke, Burke, A.E. - Erasmus Research Institute of Management (ERIM), … - 2009

innovation’ as the primary goal where firms must create consumer demand and exploit untapped markets. Empirical analysis has been …

Persistent link: https://www.econbiz.de/10010731010

Approximating the Randomized Hitting Time Distribution of a Non-stationary Gamma Process

Nicolai, R.P.; Frenk, Frenk, J.B.G. - Erasmus Research Institute of Management (ERIM), … - 2007

The non-stationary gamma process is a non-decreasing stochastic process with independent increments. By this monotonic behavior this stochastic process serves as a natural candidate for modelling time-dependent phenomena such as degradation. In condition-based maintenance the first time such a...

Persistent link: https://www.econbiz.de/10010731493

Explaining Preferences and Actual Involvement in Self-Employment: New Insights into the Role of Gender

Verheul, Ingrid; Thurik, Roy; Grilo, Grilo, I. - Erasmus Research Institute of Management (ERIM), … - 2008

This paper investigates why women’s self-employment rates are consistently lower than those of men. It has three focal points. It discriminates between the preference for self-employment and actual involvement in self-employment using a two (probit) equation model. It makes a systematic...

Persistent link: https://www.econbiz.de/10010731095

A Deterministic Inventory/Production Model with General Inventory Cost Rate Function and Concave Production Costs

Birbil, Birbil, S.I.; Frenk, Frenk, J.B.G.; Bayindir, … - Erasmus Research Institute of Management (ERIM), … - 2004

We present a thorough analysis of the economic order quantity model with shortages under a general inventory cost rate function and concave production costs. By using some standard results from convex analysis, we show that the model exhibits a composite concave-convex structure. Consequently,...

Persistent link: https://www.econbiz.de/10010837523

Equilibrium Constrained Optimization Problems

Birbil, Birbil, S.I.; Bouza, G.; Frenk, Frenk, J.B.G.; … - Erasmus Research Institute of Management (ERIM), … - 2003

We consider equilibrium constrained optimization problems, which have a general formulationthat encompasses well-known models such as mathematical programs with equilibrium constraints, bilevel programs, and generalized semi-infinite programming problems. Based on the celebrated K K M lemma, we...

Persistent link: https://www.econbiz.de/10010837543

Lagrangian duality and cone convexlike functions

Frenk, Frenk, J.B.G.; Kassay, G. - Erasmus Research Institute of Management (ERIM), … - 2005

In this paper we will show that the closely K-convexlike vector-valued functions with K Rm a nonempty convex cone and related classes of vector-valued functions discussed in the literature arise naturally within the theory of biconjugate functions applied to the Lagrangian perturbation scheme in...

Persistent link: https://www.econbiz.de/10010837561

On Borel Probability Measures and Noncooperative Game Theory

Frenk, Frenk, J.B.G.; Kassay, G.; Protassov, V. - Erasmus Research Institute of Management (ERIM), … - 2002

In this paper the well-known minimax theorems of Wald, Ville and Von Neumann are generalized under weaker topological conditions onthe payoff function ƒ and/or extended to the larger set of the Borel probabilitymeasures instead of the set of mixed strategies.

Persistent link: https://www.econbiz.de/10010837609

A Note on the Dual of an Unconstrained (Generalized) Geometric Programming Problem

Frenk, Frenk, J.B.G.; Still, G.J. - Erasmus Research Institute of Management (ERIM), … - 2005

In this note we show that the strong duality theorem of an unconstrained (generalized) geometric programming problem as defined by Peterson (cf.[1]) is actually a special case of a Lagrangian duality result. Contrary to [1] we also consider the case that the set C is compact and convex and in...

Persistent link: https://www.econbiz.de/10010837629

An Integrated Approach to Single-Leg Airline Revenue Management: The Role of Robust Optimization

Birbil, Birbil, S.I.; Frenk, Frenk, J.B.G.; Gromicho, … - Erasmus Research Institute of Management (ERIM), … - 2006

In this paper we introduce robust versions of the classical static and dynamic single leg seat allocation models as analyzed by Wollmer, and Lautenbacher and Stidham, respectively. These robust models take into account the inaccurate estimates of the underlying probability distributions. As...

Persistent link: https://www.econbiz.de/10010730861