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Bootstrap estimation of uncertainty in prediction for generalized linear mixed models

In the framework of Mixed Models, it is often of interest to provide an es- timate of the uncertainty in predictions for the random effects, customarily defined by the Mean Squared Error of Prediction (MSEP). To address this computation in the Generalized Linear Mixed Model (GLMM) context, a non-parametric Bootstrap algorithm is proposed. First, a newly developed Bootstrap scheme…

Institution partenaire

Université de Genève

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English / 01/01/2017

The Impact of Celebrity Endorsement and Celebrity Co-branding on Perceived Quality: The Role of Celebrity Application Frequency Within a Brand

Retailers have used celebrity endorsement (CE), an advertising strategy, for several decades to advertise the retailer’s brand or their private labels (PL); however, the emergence of celebrity co-branding (CCOB), a branding strategy, in combination with PL is a relatively new trend worldwide. Evidence from practice indicates that the most successful co-branded premium PL are the ones…

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English / 01/01/2017

Interests groups in parliament: exploring MPs' interest affiliations (2000-2011)

This research note presents an innovative dataset of Swiss MPs' interest ties between 2000-2011. The longitudinal analysis shows that the average number of interest ties per MP has more than doubled: from 3.5 in 2000 to 7.6 in 2011. Since the mid-2000s, public interest groups have accounted for approximately one out of two ties between MPs and interest groups, showing the…

Institution partenaire

Université de Genève

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English / 01/01/2017

An industrial design solution for integrating NMR magnetic field sensors into an MRI scanner

Purpose: Neuroimaging research relies on the skills of increasingly multidisciplinary individuals and often requires the installation and use of additional home-built or third-party equipment. The purpose of the present work was the safe, ergonomic, durable, and aesthetically pleasing installation of magnetic field monitoring equipment into a scanner, while keeping the setup…

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English / 01/01/2017

Team design with (female) leaders in mind: restoring equity in leadership evaluations

The leadership literature shows consistent, sizeable, and persistent effects indicating that female leaders face significant biases in the workplace compared with male leaders. However, the social identity leadership literature suggests these biases might be overcome at the team level by adjusting the number of women in the team. Building on this work, we conducted 2 multiple source…

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English / 01/01/2017

Tx/Rx head coil induces less RF transmit-related heating than body coil in conductive metallic objects outside the active area of the head coil

The transmit–receive (Tx/Rx) birdcage head coil is often used for excitation instead of the body coil because of the presumably lower risk of heating in and around conductive implants. However, this common practice has not been systematically tested. To investigate whether the Tx/Rx birdcage head coil produces less heating than the body coil when scanning individuals with implants,…

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English / 01/01/2017

Comparison of the working memory load in N-Back and working memory span tasks by means of EEG frequency band power and P300 amplitude

According to theoretical accounts, both, N-back and complex span tasks mainly require working memory (WM) processing. In contrast, simple span tasks conceptually mainly require WM storage. Thus, conceptually, an N-back task and a complex span task share more commonalities as compared to a simple span task. In the current study, we compared an N-back task, a complex operation span…

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English / 01/01/2017

Impact evaluation methods in public economics : a brief introduction to randomized evaluations and comparison with other methods

Recent years have seen a large expansion in the use of rigorous impact evaluation techniques. Increasingly, public administrations are collaborating with academic economists and other quantitative social scientists to apply such rigorous methods to the study of public finance. These developments allow for more reliable measurements of the effects of different policy options on the…

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English / 01/01/2017

You get what you 'pay' for: Academic attention, career incentives and changes in publication portfolios of business and economics researchers

Since the 1990s, research on publication outputs in business and economics has almost exclusively focused on journal articles. While earlier work has shown that journal articles and other publications were indeed complements in the 70s and 80s, we find that this is no longer the case when we include the most recent decades. Apparently, the notable shift in the scientific community’s…

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English / 01/01/2017

‘High’ achievers? Cannabis access and academic performance

This paper investigates how legal cannabis access affects student performance. Identification comes from an exceptional policy introduced in the city of Maastricht in the Netherlands that discriminated access via licensed cannabis shops based on an individual’s nationality. We apply a difference-in-difference approach using administrative panel data on course grades of local students…

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English / 01/01/2017

Vouchers for future kidney transplants to overcome “chronological incompatibility” between living donors and recipients

Background: The waiting list for kidney transplantation is long. The creation of “vouchers” for future kidney transplants enables living donation to occur when optimal for the donor and transplantation to occur later, when and if needed by the recipient.
Methods: The donation of a kidney at a time that is optimal for the donor generates a “voucher” that only a specified…

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English / 01/01/2017

Neural control of social decisions

Social decisions are among the most important choices in our life. They are often proposed to rely on functionally specialized neural circuitry, based on correlated neural activity observed with neuroimaging. However, neuroimaging studies usually do not allow conclusions about whether the identified neural activity causally controls behavior, rather than being a consequence of it.…

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English / 01/01/2017

Overconfidence and investment: an experimental approach

A positive relation between overconfidence and investment provision has been theoretically justified and practically assumed in the literature, but has not been thoroughly investigated. We test and confirm this positive relation between direct measures of overconfidence in one's financial knowledge and choice of investment. More precisely, strong overconfidence results in excess…

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English / 01/01/2017

Rage against the machines: labor-Saving technology and unrest in England, 1830-32

Can the adoption of labor-saving technology lead to social instability and unrest? We examine a canonical historical case, the so-called ‘Captain Swing’ riots in 1830s Britain. Variously attributed to the adverse consequences of weather shocks, the shortcomings of the Poor Law, or the after-effects of enclosure, we emphasize the importance of a new technology – the threshing machine…

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English / 01/01/2017

Aggregate sentiment and investment: an experimental study

Sentiment indices, such as measures of consumer confidence, are often discussed as potential indicators of future investment, consumption and growth. However, documenting a causal relationship between consumer confidence and output — and understanding the precise nature of the relationship — using field data has been challenging. We rely on the high degree of control afforded by a…

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English / 01/01/2017

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