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Poorly measured confounders are more useful on the left than on the right

Researchers frequently test identifying assumptions in regression based research designs (which include instrumental variables or difference-in-differences models) by adding additional control variables on the right hand side of the regression. If such additions do not affect the coefficient of interest (much) a study is presumed to be reliable. We caution that such invariance may…

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English / 01/03/2017

Toxic sustainable companies? A critique on the shortcomings of current corporate sustainability ratings and a definition of ‘financial toxicity

Building on critical literature on corporate sustainability, we add a perspective thus far only scarcely addressed: The toxicity of financial products imposing systemic risk. We start with various illustrative cases from the financial sector which have also been discussed colorfully in the media. This sets the stage for toxic assets and practices as revealed after the onset of the…

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English / 01/03/2017

Bank market power and firm performance

Does market power of banks affect firm performance? To answer this question we examine 25,236 syndicated loan facilities granted between 2000 and 2010 by 296 banks to 9,029 US non-financial firms. Accounting for both observed and unobserved bank and firm heterogeneity, we find that firms that were recently poorly performing obtain loans from banks with more market power. However, in…

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English / 01/03/2017

Decision-making in multiple sclerosis: the role of aversion to ambiguity for therapeutic inertia among neurologists (DIScUTIR MS)

Objectives: Limited information is available on physician-related factors influencing therapeutic inertia (TI) in multiple sclerosis (MS). Our aim was to evaluate whether physicians’ risk preferences are associated with TI in MS care, by applying concepts from behavioral economics.
Design: In this cross-sectional study, participants answered questions regarding the management…

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English / 01/03/2017

Analysis of the precision of variable flip angle T1 mapping with emphasis on the noise propagated from RF transmit field maps

In magnetic resonance imaging, precise measurements of longitudinal relaxation time (T1) is crucial to acquire useful information that is applicable to numerous clinical and neuroscience applications. In this work, we investigated the precision of T1 relaxation time as measured using the variable flip angle method with emphasis on the noise propagated from radiofrequency transmit…

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English / 01/03/2017

Maintaining efficiency while integrating entrants from lower performing groups: an experimental study

Efficiently growing a group often requires integrating individuals from lower performing entities. We explore the effectiveness of policies intended to facilitate such integration, using an experiment that models production as a coordination game. We create an efficient group and an inefficient one. We then allow individuals to move into the efficient group under different mechanisms…

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English / 01/03/2017

Dopamine modulates the functional organization of the orbitofrontal cortex

Neuromodulators such as dopamine can alter the intrinsic firing properties of neurons, and may thereby change the configuration of larger functional circuits. The primate orbitofrontal cortex (OFC) receives dopaminergic input from midbrain nuclei, but the role of dopamine in the OFC is still unclear. Here we tested the idea that dopaminergic activity changes the pattern of…

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English / 08/02/2017

Discrete-time option pricing with stochastic liquidity

Classical option pricing theories are usually built on the law of one price, neglecting the impact of market liquidity that may contribute to significant bid-ask spreads. Within the framework of conic finance, we develop a stochastic liquidity model, extending the discrete-time constant liquidity model of Madan (2010). With this extension, we can replicate the term and skew…

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English / 01/02/2017

Network formation with local complements and global substitutes: the case of R&D networks

In this paper we introduce a stochastic network formation model where agents choose both actions and links. Neighbors in the network benefit from each other’s action levels through local complementarities and there exists a global interaction effect reflecting a strategic substitutability in actions. The tractability of the model allows us to provide a complete equilibrium…

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English / 01/02/2017

The taxation of superstars

How are optimal taxes affected by superstar phenomena? To answer this question, we extend the Mirrlees model to incorporate an assignment problem in the labor market that generates superstar effects. Perhaps surprisingly, rather than providing a rationale for higher taxes, we show that superstar effects provide a force for lower marginal taxes conditional on the observed distribution…

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English / 01/02/2017

The lasting legacy of seasonal influenza: in-utero exposure and labor market outcomes

Pregnancy conditions have been shown to matter for later economic success, but many threats to fetal development that have been identified are difficult to prevent. In this paper I study seasonal influenza, a preventable illness that comes around every year and causes strong inflammatory responses in pregnant women. Using administrative data from Denmark, I identify the effects of…

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English / 01/02/2017

Firm industry affiliation and multiple bank relationships

We explain the number of bank relationships a firm maintains by the number of industries it operates in, analyzing 13,570 listed firms in 18 Eastern European countries. We estimate a variety of stylized models including OLS, Tobit and negative binomial that directly accounts at once for the number of bank relationships. Controlling for many firm characteristics and accounting for all…

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English / 01/02/2017

When work disappears: manufacturing decline and the falling marriage-market value of men

The structure of marriage and child-rearing in U.S. households has undergone two marked shifts in the last three decades: a steep decline in the prevalence of marriage among young adults, and a sharp rise in the fraction of children born to unmarried mothers or living in single-headed households. A potential contributor to both phenomena is the declining labor-market opportunities…

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English / 01/02/2017

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