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Can personality type explain heterogeneity in probability distortions?

There are two regularities we have learned from experimental studies of choice under risk. The
first is that the majority of people weigh objective probabilities nonlinearly. The second regularity,
although less commonly acknowledged, is that there is a large amount of heterogeneity in how
people distort probabilities. Despite this, little effort has been made to...

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English / 01/01/2013

Competition and investment — A unified approach

Using a simple but general two-­‐‑stage framework, this paper identifies the circumstances under
which increasing competition leads to more cost-­‐‑reducing investments. The framework can, for
instance, capture increasing substitutability for different types of oligopoly models or changes from Cournot to Bertrand competition. The paper identifies four transmission...

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English / 01/01/2013

Posttraumatic Stress Disorder Increases Sensitivity to Long Term Losses among Patients with Major Depressive Disorder

Background

Decisions under risk and with outcomes that are delayed in time are ubiquitous in real life and can have a significant impact on the health and wealth of the decision-maker. Despite its potential relevance for real-world choices, the degree of aberrant risky and intertemporal decision-making in patients suffering from major depressive disorder (MDD) and...

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English / 01/01/2013

High-frequency TRNS reduces BOLD activity during visuomotor learning

Transcranial direct current stimulation (tDCS) and transcranial random noise stimulation (tRNS) consist in the application of electrical current of small intensity through the scalp, able to modulate perceptual and motor learning, probably by changing brain excitability. We investigated the effects of these transcranial electrical stimulation techniques in the early and later stages...

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English / 01/01/2013

BOLD responses in human V1 to local structure in natural scenes: Implications for theories of visual coding

In this study we tested predictions of two important theories of visual coding, contrast energy and sparse coding theory, on the dependence of population activity level and metabolic demands on spatial structure of the visual input. With carefully calibrated displays we find that in humans neither the V1 blood oxygenation level dependent (BOLD) response nor the initial visually...

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English / 01/01/2013

Mining local connectivity patterns in fMRI data

A core task in the analysis of functional magnetic resonance imaging (fMRI) data is to detect groups of voxels that exhibit synchronous activity while the subject is performing a certain task. Synchronous activity is typically interpreted as functional connectivity between brain regions. We compare classical approaches like statistical parametric mapping (SPM) and some new approaches...

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English / 01/01/2013

No effects of psychosocial stress on intertemporal choice

Intertemporal choices - involving decisions which trade off instant and delayed outcomes - are often made under stress. It remains unknown, however, whether and how stress affects intertemporal choice. We subjected 142 healthy male subjects to a laboratory stress or control protocol, and asked them to make a series of intertemporal choices either directly after stress, or 20 minutes...

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English / 01/01/2013

An externality-robust auction - theory and experimental evidence

An auction is said to be externality-robust if unilateral deviations from equilibrium leave the remaining bidders’ payoffs unaffected. The equilibrium and its outcome will then persist even if externalities between bidders arise from certain types of interdependent preferences. One important example are externalities due to spiteful preferences, which are frequently used to explain...

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English / 01/01/2013

Punishment-based decision making

This Research Topic covers issues in psychology, behavioral economics, and cognitive neuroscience investigating the neural structures and mechanisms underlying approach, and avoidance behavior in the face of rewards and punishments. The objective is to understand the nature of critical differences and asymmetries between the ways that appetitive and aversive outcomes are processed by...

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English / 01/01/2013

Temporally dissociable mechanisms of self-control: early attentional filtering versus late value modulation

Optimal decision-making often requires exercising self-control. A growing fMRI literature has implicated the dorsolateral prefrontal cortex (dlPFC) in successful self-control, but due to the limitations inherent in BOLD measures of brain activity, the neurocomputational role of this region has not been resolved. Here we exploit the high temporal resolution and whole-brain coverage of...

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English / 01/01/2013

Automatic processing of political preferences in the human brain

Individual political preferences as expressed, for instance, in votes or donations are fundamental to democratic societies. However, the relevance of deliberative processing for political preferences has been highly debated, putting automatic processes in the focus of attention. Based on this notion, the present study tested whether brain responses reflect participants'...

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English / 01/01/2013

The role of neural impulse control mechanisms for dietary success in obesity

Deficits in impulse control are discussed as key mechanisms for major worldwide health problems such as drug addiction and obesity. For example, obese subjects have difficulty controlling their impulses to overeat when faced with food items. Here, we investigated the role of neural impulse control mechanisms for dietary success in middle-aged obese subjects. Specifically, we used a...

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English / 01/01/2013

Does raising the early retirement age increase employment of older workers?

Two pension reforms in Austria increased the early retirement age (ERA) from 60 to 62 for men and from 55 to 58.25 for women. We find that raising the ERA increased employment by 9.75 percentage points among affected men and by 11 percentage points among affected women. The reforms had large spillover effects on the unemployment insurance program but negligible effects on disability...

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English / 01/01/2013

Skaleneffekte bei Verwaltungs- und Verfahrenskosten der Unfallversicherungsträger der öffentlichen Hand

Die gesetzliche Unfallversicherung wurde im Rahmen des Unfallversicherungsmodernisierungsgesetzes (UVMG) zum 1.1.2009 grundlegend reformiert. Ein wesentliches Ziel der Reformen war es, durch Fusionen der Versiche-rungsträger die Verwaltungs- und Verfahrenskosten je Versicherten zu reduzieren, also Skaleneffekte zu realisieren. Allerdings gab es zum Zeitpunkt der Reform keinerlei...

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Deutsch / 01/01/2013

The Growth of Low-Skill Service Jobs and the Polarization of the US Labor Market

We offer a unified analysis of the growth of low-skill service occupations between 1980 and 2005 and the concurrent polarization of US employment and wages. We hypothesize that polarization stems from the interaction between consumer preferences, which favor variety over specialization, and the falling cost of automating routine, codifiable job tasks. Applying a spatial equilibrium...

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English / 01/01/2013

The Geography of Trade and Technology Shocks in the United States

This paper explores the geographic overlap of trade and technology shocks across local labor markets in the United States. Regional exposure to technological change, as measured by specialization in routine task-intensive production and clerical occupations, is largely uncorrelated with regional exposure to trade competition from China. While the impacts of technology are dispersed...

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English / 01/01/2013

Cost-reducing investments – An experimental approach

This paper summarizes and discusses some recent experimental results on cost-reducing investments. I focus on the relation between competition and investments and on increasing dominance.

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English / 01/01/2013

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