A standard test for weak instruments compares the first-stage F-statistic to a table of critical values obtained by Stock and Yogo (2005) using simulations. We derive a closed-form solution for the expectation from which these critical values are derived, as well as present some second-order...

This paper proposes an approach to measure the extent of nonlinearity of the exposure of a financial asset to a given risk factor. The proposed measure exploits the decomposition of a conditional expectation into its linear and nonlinear components. We illustrate the method with the measurement...

For nearly every major stock market there exist equity and implied volatility indices. These play important roles within finance: be it as a benchmark, a measure of general uncertainty or a way of investing or hedging. It is well known in the academic literature that correlations and higher...

Recently, several copula-based approaches have been proposed for modeling stationary multivariate time series. All of them are based on vine copulas, and they differ in the choice of the regular vine structure. In this article, we consider a copula autoregressive (COPAR) approach to model the...

Kein Thema stiftet mehr Verwirrung auf der Welt als das der „Schulden“. Bei keinem Thema gibt es größeren Aufklärungsbedarf, weil kein Thema für die Wirtschaftspolitik und insbesondere für die europäische Wirtschaftspolitik von größerer Bedeutung ist. Überall ist von Überschuldung...

We analyze the cross-section of more than 1200 cryptocurrencies derived from 350 exchanges in the time period from January 2014 to June 2020. Specifically, we investigate whether well-known cross-sectional characteristics like beta (Fama/MacBeth (1973)), size (Banz (1981)) or momentum (...

Die Transmission monetärer Impulse auf zunehmend integrierten Finanzmärkten ist von herausragender Bedeutung für die Zentralbanken. Falls die starke Ausweitung der Liquidität in den letzten Jahren zu den Preisübertreibungen an den Finanzmärkten beigetragen hat, könnte die Einbeziehung von...

Im Herbst 2008 war weltweit ein schnelles Handeln der Politik erforderlich, um den drohenden Kollaps des globalen Finanzsystems abzuwenden. Neben diesen alternativlosen Sofortmaßnahmen muss in der mittleren bis langen Frist der Finanzsektor reformiert werden. Eine verbesserte Stabilität soll...

From the economists' perspective, the Capital Markets Union (CMU) represents a policy experiment that allows studying how legal conditions, economic incentives and financial activity interact. Recent papers provide economic support for the overall objective of CMU, but the robustness of this...

Estimation of GARCH models can be simplified by augmenting quasi-maximum likelihood (QML) estimation with variance targeting, which reduces the degree of parameterization and facilitates estimation. We compare the two approaches and investigate, via simulations, how non-normality features of the...