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Culture, work attitudes, and job search: evidence from the Swiss language border

Unemployment varies across space and in time. Can attitudes toward work explain some of these differences? We study job search durations along the Swiss language border, sharply separating Romance language speakers from German speakers. According to surveys and voting results, the language border separates two social groups with different cultural background and attitudes toward work…

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English / 01/10/2017

Delegating performance evaluation

We study optimal incentive contracts with multiple agents when performance evaluation is delegated to a reviewer. The reviewer may be biased in favor of the agents, but the degree of the bias is unknown to the principal. We show that a contest, which is a contract in which the principal determines a set of prizes to be allocated to the agents, is optimal. By using a contest, the…

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English / 01/10/2017

Capital Regulation and Credit Fluctuations

We provide a rationale for imposing counter-cyclical capital ratios on banks. In our simple model, bankers cannot pledge the entire future revenues to investors, which limits borrowing in good and bad times. Complete markets do not sufficiently stabilize credit fluctuations, as banks allocate too much borrowing capacity to good states and too little to bad states. As a consequence,…

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English / 01/10/2017

Trading down and the business cycle

We document two facts. First, during the Great Recession, consumers traded down in the quality of the goods and services they consumed. Second, the production of low-quality goods is less labor intensive than that of high-quality goods. When households traded down, labor demand fell, increasing the severity of the recession. We find that the trading-down phenomenon accounts for a…

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English / 01/10/2017

The Spanish or the German apartment? Study abroad and the acquisition of permanent skills

In Europe, more than 250,0 0 0 university students spend one or two semesters abroad every year. This study explores whether a short time abroad contributes to the acquisition of foreign language proficiency. We use a newly available dataset about almost the totality of Italian graduates and two alternative in- struments to address the endogeneity of studying abroad. Both instruments…

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English / 01/10/2017

Shadow banking and competition: Decomposing market power by activity

The term “shadow banking” refers to credit intermediation performed outside the regulated perimeter of traditional lenders. Banks, however, do play a significant role in it. The authors review the origins and characteristics of the shadow banking system, investigate how banks control various steps of the securitization process, and analyze the nexus with competition. They use a…

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English / 29/09/2017

Autoregressive Lag-Order Selection Using Conditional Saddlepoint Approximations

A new method for determining the lag order of the autoregressive polynomial in regression models with autocorrelated normal disturbances is proposed. It is based on a sequential testing procedure using conditional saddlepoint approximations and permits the desire for parsimony to be explicitly incorporated, unlike penalty-based model selection methods. Extensive simulation results…

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English / 19/09/2017

"US-Forscher kommen lieber nach Zürich"

Die Uni Zürich ist die forschungsstärkste VWL-Hochschule im deutschsprachigen Raum und peilt nun die Weltspitze an. Direktor Rainer Winkelmann über die Zukunft und die Probleme der Zunft.

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Deutsch / 12/09/2017

Approximations and generalized Newton methods

We present approaches to (generalized) Newton methods in the framework of generalized equations $0\in f(x)+M(x)$, where $f$ is a function and $M$ is a multifunction. The Newton steps are defined by approximations $\hat f$ of $f$ and the solutions of $0\in \hat{f}(x)+M(x)$. We give a unified view of the local convergence analysis of such methods by connecting a certain type of…

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English / 11/09/2017

"Ökonomen müssen nicht populär sein"

Der Zürcher Starökonom Ernst Fehr über die Kritik an den Wirtschaftswissenschaften und die Lehren aus der jüngsten Finanzkrise.

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Deutsch / 08/09/2017

Contests with small noise and the robustness of the all-pay auction

This paper considers all-pay contests in which the relationship between bids and allocations reflects a small amount of noise. Prior work had focused on one particular equilibrium. However, there may be other equilibria. To address this issue, we introduce a new and intuitive measure for the proximity to the all-pay auction. This allows, in particular, to provide simple conditions…

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English / 01/09/2017

The limits to moral erosion in markets: social norms and the replacement excuse

This paper studies the impact of a key feature of competitive markets on moral behavior: the possibility that a competitor will step in and conclude the deal if a conscientious market actor forgoes a profitable business opportunity for ethical reasons. We study experimentally whether people employ the argument "if I don’t do it, someone else will" to justify taking a…

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English / 01/09/2017

Portfolio Diversification and Systemic Risk in Interbank Networks

The recent credit crisis of 2007/08 has raised a debate about the so-called knife-edge properties of financial markets. The paper contributes to the debate shedding light on the controversial relation between risk-diversification and financial stability. We model a financial network where assets held by borrowers to meet their obligations, include claims against other borrowers and…

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English / 01/09/2017

Direct Nonlinear Shrinkage Estimation of Large-Dimensional Covariance Matrices

This paper introduces a nonlinear shrinkage estimator of the covariance matrix that does not require recovering the population eigenvalues first. We estimate the sample spectral density and its Hilbert transform directly by smoothing the sample eigenvalues with a variable-bandwidth kernel. Relative to numerically inverting the so-called QuEST function, the main advantages of direct…

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English / 01/09/2017

Signaling to experts

We study competitive equilibrium in a signaling economy with heterogeneously informed buyers. In terms of the classic Spence (1973) model of job market signaling, firms have access to direct but imperfect information about worker types, in addition to observing their education. Firms can be ranked according to the quality of their information, i.e. their expertise. In equilibrium,…

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English / 01/09/2017

Gender bias in teaching evaluations

This paper provides new evidence on gender bias in teaching evaluations. We exploit a quasi-experimental dataset of 19,952 student evaluations of university faculty in a context where students are randomly allocated to female or male instructors. Despite the fact that neither students' grades nor self-study hours are affected by the instructor's gender, we find that women…

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English / 01/09/2017

Does expanding regional train service reduce air pollution?

We assess how regional rail service affects air pollution in Germany, where rail service is procured in auctions or negotiations. We argue that the procurement mode is plausibly exogenous, and show that auctions deliver stronger rail service growth than negotiations. Instrumenting rail service growth with procurement mode, we find that increasing rail service by 10% reduces carbon…

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English / 01/09/2017

Students are almost as effective as professors in university teaching

Many universities around the world rely on student instructors—current bachelor’s and master’s degree students—for tutorial teaching, yet we know nothing about their effectiveness. In a setting with random assignment of instructors to students, we show that student instructors are almost as effective as senior instructors at improving their students’ short- and longer-run academic…

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English / 01/09/2017

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