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The production of entrepreneurial opportunity: A constructivist perspective

This article presents a conceptual model of entrepreneurial opportunity production from a constructivist perspective. The model assumes that opportunity production proceeds through several stages, including conceptualization of an opportunity idea by an entrepreneur, objectification of that idea, and enactment of the opportunity into a new venture. However, not all opportunity ideas...

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English / 01/01/2010

Organizational theory development: Displacement of ends?

In this essay I argue that organization theory has witnessed a significant displacement of ends over the last 30 years. Whereas in the 1960s and 1970s the dominant goal of the discipline was achieving consensus on the validity status of theories, today the overriding goal appears to be development of new theory. Formerly new theory development was considered a means to the end of...

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English / 01/01/2010

Technology shocks and aggregate fluctuations in an estimated hybrid RBC model

This paper contributes to the on-going empirical debate regarding the role of the RBC model and in particular of neutral and investmentspecific technology shocks in explaining aggregate fluctuations. To achieve this, we estimate the model’s posterior density using Bayesian
methods. Within this framework we first extend Ireland’s (2001, 2004) hybrid estimation approach to allow...

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English / 01/01/2010

Reactive mechanism of cognitive control system

The prefrontal cortex (PFC) is thought to modulate the neural network state in favor of the processing of task-relevant sensory information prior to the presentation of sensory stimuli. However, this proactive control mechanism cannot always optimize the network state because of intrinsic fluctuation of neural activity upon arrival of sensory information. In the present study, we...

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English / 01/01/2010

Value computations in ventral medial prefrontal cortex during charitable decision making incorporate input from regions involved in social cognition

Little is known about the neural networks supporting value computation during complex social decisions. We investigated this question using functional magnetic resonance imaging while subjects made donations to different charities. We found that the blood oxygenation level-dependent signal in ventral medial prefrontal cortex (VMPFC) correlated with the subjective value of voluntary...

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English / 01/01/2010

Neural computations associated with goal-directed choice

In goal-directed decision-making, animals choose between actions that are associated with different reward outcomes (e.g., foods) and with different costs (e.g., effort). Rapid advances have been made over the past few years in our understanding of the computations associated with goal-directed choices, and of how those computations are implemented in the brain. We review some...

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English / 01/01/2010

How Europe should harness market forces to deal with sovereign credit risk

If a European Monetary Fund does happen, how would it work? This column proposes a European Sovereign Insurance Scheme to sell bond insurance on EMU members' sovereign debt. In good times the insurance fees would allow the EMF to build up a capital cushion. In bad times, the EMF could use these funds to facilitate an orderly unwinding of the default – while imposing tough...

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English / 01/01/2010

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