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Understanding a firm’s openness decisions in innovation

The degree of openness in innovation, ranging from closed to multiple levels of openness, is a key strategic decision for managers. Therefore, this study aims to carefully investigate the underlying drivers of openness. A major result of this study is that the degree of openness underlies separate mechanisms for being closed in innovation and higher degrees of openness. The factors...

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English / 01/01/2012

Shifting the blame: On delegation and responsibility

To fully understand the motives for delegating a decision right, it is important to study responsibility attributions for outcomes of delegated decisions. We conducted laboratory experiments in which subjects could either choose a fair allocation or an unfair allocation or delegate the choice, and we used a punishment option to elicit responsibility attributions. Our results show...

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English / 01/01/2012

Nonlinear shrinkage estimation of large-dimensional covariance matrices

Many statistical applications require an estimate of a covariance matrix and/or its inverse. Whenthe matrix dimension is large compared to the sample size, which happens frequently, the samplecovariance matrix is known to perform poorly and may suffer from ill-conditioning. There alreadyexists an extensive literature concerning improved estimators in such situations. In the absence...

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English / 01/01/2012

Vitreous deformation during eye movement

Retinal detachment results in visual loss and requires surgical treatment. The risk of retinal detachment depends, among other factors, on the vitreous rheology, which varies with age. To date, the viscoelasticity of the vitreous body has only been measured in cadaver eyes. However, the ex vivo and in vivo viscoelasticity may differ as a result of the effect of intravitreal membranes...

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English / 01/01/2012

A comparison of estimation methods for vector autoregressive moving-average models

Recently, there has been a renewed interest in modeling economic time series by vectorautoregressive moving-average models. However, this class of models has been unpopularin practice because of estimation problems and the complexity of the identication stage.These disadvantages could have led to the dominant use of vector autoregressive modelsin macroeconomic research. In this paper...

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English / 01/01/2012

The currency of reciprocity: Gift exchange in the workplace

What determines reciprocity in employment relations? We conducteda controlled field experiment to measure the extent to whichmonetary and non-monetary gifts affect workers’ performance. We findthat non-monetary gifts have a much stronger impact than monetarygifts of equivalent value. We also observe that when workers are offeredthe choice, they prefer receiving money but reciprocate...

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English / 01/01/2012

Leadership and influence: Evidence from an artefactual field experiment on local public good provision

This paper studies the effect of leadership on the level and evolution of pro-social behavior using an artefactual field experiment on local public good provision. Participants decide how much to contribute to an actual conservation project. They can then revise their donations after being randomly matched in pairs on the basis of their authority and having observed each other’s...

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English / 01/01/2012

Controlling the danger of false discoveries in estimating multiple treatment effects

I expose the risk of false discoveries in the context of multiple treatment effects. A false discovery is a nonexistent effect that is falsely labeled as statistically significant by its individual t-value. Labeling nonexistent effects as statistically significant has wide-ranging academic and policy-related implications, like costly false conclusions from policy evaluations. I...

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English / 01/01/2012

Whom do you distrust and how much does it cost? An experiment on the measurement of trust

We advance the measurement of trust in economics in two ways. First, we highlight the importance of clearly identifying the target of trust, particularly for obtaining concordance between attitudinal and behavioral measures of trust. Second, we introduce a novel behavioral measure of (dis)trust, based on individuals? willingness to pay to avoid being vulnerable to the target of trust...

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English / 01/01/2012

The home bias, capital income flows and improved long-term consumption risk sharing between industrialized countries

Is financial globalization associated with improved international consumption
risk sharing? We focus on the long-term (i.e. low frequency) comovement
of consumption and output in answering this question. Theoretically,
the impact of financial globalization should show up first and most robustly
in the lower frequencies of the data. We show that this is the...

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English / 01/01/2012

Sorting in experiments with application to social preferences

Individuals sort into and out of economic environments based on their preferences and in response
to relative prices. We demonstrate the importance of such sorting for the measurement of social
preferences, using two laboratory experiments. First, allowing subjects to avoid environments in
which sharing is possible significantly reduces sharing. This reveals the...

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English / 01/01/2012

Probability and risk: Foundations and economicimplications of probability-dependent risk preferences

Probability weighting has been largely ignored by economics despite abundant evidence that riskattitudes are in fact probability dependent. Probability weighting, however, provides a unifyingaccount of many real-world phenomena that are diffcult to reconcile with expected utility theory,such as the equity premium puzzle, the long-shot bias in betting markets, households'...

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English / 01/01/2012

Securitization of mortgage debt, domestic lending, and international risk sharing

Securitization makes mortgage-related risks internationally tradeable and thus contributes considerably to the international diversification of macroeconomic risk: in the years 2003–2008, the increase in international cross-holdings of securitized mortgage debt has lowered industrialized countries’ conditional consumption volatility (relative to the United States) by about 10–15...

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English / 01/01/2012

The social dimension of stress reactivity: acute stress increases prosocial behavior in humans

Psychosocial stress precipitates a wide spectrum of diseases with major public-health significance.The fight-or-flight response is generally regarded as the prototypic human stress response, bothphysiologically and behaviorally. Given that having positive social interactions before beingexposed to acute stress plays a preeminent role in helping individuals control their...

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English / 01/01/2012

New evidence on testosterone and cooperation: reply

van Honk and colleagues have taken our findings on the role of testosterone in ultimatum gamebargaining1 a step forward by showing that the hormone has important prosocial effects beyondthe ultimatum game by increasing cooperation in the public goods game (PGG)2. In contrast to theultimatum game, participants in the PGG decide simultaneously about their cooperation levels andare not...

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English / 01/01/2012

Linking brain structure and activation in temporoparietal junction to explain the neurobiology of human altruism

Human altruism shaped our evolutionary history and pervades social and political life. There are,however, enormous individual differences in altruism. Some people are almost completely selfish,while others display strong altruism, and the factors behind this heterogeneity are only poorlyunderstood. We examine the neuroanatomical basis of these differences with voxel-basedmorphometry...

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English / 01/01/2012

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