We propose a specification test of a parametrically specified model against a weakly specified alternative. The latter is estimated using K nonparametric nearest neighbors (K-NN) in the context of an artificial regression. We derived the asymptotic distribution under the null hypothesis and...

We propose a specification test of a parametrically specified nonlinear model against a weakly specified alternative. We generalize a similar test procedure proposed by Delgado and Stengos (1990) to test the specification of a linear model. We estimate the alternative model by using K...

Einkaufen ist im Leben der Menschen seit vielen Jahren nicht mehr nur die Versorgung mit Lebensmitteln und Waren, sondern zugleich ein Freizeiterlebnis. Die Mehrfachqualität dieser Daseinsgrundfunktion 'Versorgung' ist dadurch ein bestimmender Faktor für die Entwicklung der örtlichen und...

Bei der Ansiedlung großflächiger Einzelhandelsvorhaben stellt sich stets die Frage nach ihrer Verträglichkeit. Zur Beantwortung dieser Frage sind Einzelhandelsgutachten unerlässlich. Dabei stehen die Ergebnisse und nicht zuletzt die Einzelhandelsgutachten selbst immer wieder in der Kritik,...

This paper considers the problem of testing a finite number of moment inequalities. We propose a two-step approach. In the first step, a confidence region for the moments is constructed. In the second step, this set is used to provide information about which moments are "negative." A...

Markowitz (1952) portfolio selection requires estimates of (i) the vector of expected returns and (ii) the covariance matrix of returns. Many proposals to address the first question exist already. This paper addresses the second question. We promote a new nonlinear shrinkage estimator of the...

A key stated objective of the Australian Plain Packaging Act 2011 is to influence smoking prevalence, in particular of minors. We use the Roy Morgan Single Source (Australia) data set on minors, (that is, Australians aged 14 to 17 years) over the time period January 2001 to December 2013 to...

A stated objective of the Australian Plain Packaging Act 2011 is to reduce smoking prevalence. We use the Roy Morgan Single Source (Australia) data set over the time period January 2001 to December 2013 to analyze whether this goal has been achieved in the first year since the implementation. In...