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Estimating the Impact of Financial Investments on Agricultural Futures Prices Using Changes in Volatility

This paper studies the impact of financial investments on agricultural futures prices, using structural vector autoregressions. We identify exogenous variation in net long positions of speculators through heteroskedasticity. We first show that demand shocks of both index investors and noncommercial traders lead to a statistically significant contemporaneous increase in futures prices. We then quantify ...

Pädagogische Konzeptionen von Kindertageseinrichtungen: Deskription eines pädagogischen Instruments

owohl die Praxisliteratur zum Einrichtungsmanagement als auch der Gesetzgeber sehen pädagogische Konzeptionen als ein probates Mittel zur Steuerung der Qualität von Kindertageseinrichtungen. Die vorliegende Studie untersuchte 583 Kita-Konzeptionen von Einrichtungen aus ganz Deutschland mithilfe eines neu entwickelten Codierschemas und quantitativen Analysemethoden. Im Zentrum stehen zwei Fragen: erstens ...

Transformational Strategies and Productivity Growth: A Transformational‐Activities Perspective on Stagnation in the New‐Normal Business Landscape

Declines in productivity growth substantially explain new‐normal business stagnation; yet in order to address situations of slack productivity growth, firms can choose from six generic transformational strategies: retirement, renewal, retrenchment, replication, redeployment, and recombination. While the extant literature focuses on specific transformational strategies that particular firms, or industries, ...

Trajectories of Big Five Personality Traits: A Coordinated Analysis of 16 Longitudinal Samples

This study assessed change in self-reported Big Five personality traits. We conducted a coordinated inte-grative data analysis using data from 16 longitudinal samples, comprising a total sample of over 60 000 participants.We coordinated models across multiple datasets and fit identical multi-level growth models to assess and compare theextent of trait change over time. Quadratic change was assessed ...

Exploring the Robustness of Country Rankings by Educational Attainment

The measurement scale of exam scores is ordinal. This ordinal measurement implies that monotonic transformations of published scales convey the same information. Hence, countries should not be ranked according to averaged scores because there may be transformations that would change the mean-based rankings. We suggest alternatives to the mean-based ranking procedure that yield informative and robust ...

Multiple Imputation of Binary Multilevel Missing Not at Random Data

We introduce a selection model‐based multilevel imputation approach to be used within the fully conditional specification framework for multiple imputation. Concretely, we apply a censored bivariate probit model to describe binary variables assumed to be missing not at random. The first equation of the model defines the regression model for the missing data mechanism. The second equation specifies ...

Tied and Troubled: Revisiting Tied Migration and Subsequent Employment

ObjectiveThis article looks at couples' migration decision making processes and their gender‐specific employment consequences after migration to Germany.BackgroundInternational migration has evolved into a common experience for couples around the globe. Previous research has focused on the internal migration of couples and families. This article is the first to consider couples' international migration ...

Panel Survey Recruitment With or Without Interviewers? Implications for Nonresponse, Panel Consent, and Total Recruitment Bias

A Head-to-Head Comparison of Augmented Wealth in Germany and the United States

We examine the composition of augmented household wealth, the sum of net worth and pension wealth, in the United States and Germany. Pension wealth makes up a considerable portion of household wealth of about 48% in the United States and 61% in Germany. When pension wealth is included in household wealth, the Gini coefficient falls from 0.889 to 0.700 in the United States and from 0.755 to 0.508 in ...

Inference in Partially Identified Heteroskedastic Simultaneous Equations Models

Identification through heteroskedasticity in heteroskedastic simultaneous equations models (HSEMs) is considered. The possibility that heteroskedasticity identifies structural parameters only partially is explicitly allowed for. The asymptotic properties of the identified parameters are derived. Moreover, tests for identification through heteroskedasticity are developed and their asymptotic distributions ...