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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...
Persistent link: https://www.econbiz.de/10011282464
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...
Persistent link: https://www.econbiz.de/10011282472
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...
Persistent link: https://www.econbiz.de/10011282478
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...
Persistent link: https://www.econbiz.de/10011282496
Linear regression models form the cornerstone of applied research in economics and other scientific disciplines. When conditional heteroskedasticity is present, or at least suspected, the practice of reweighting the data has long been abandoned in favor of estimating model parameters by ordinary...
Persistent link: https://www.econbiz.de/10011282509
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...
Persistent link: https://www.econbiz.de/10010326607
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,...
Persistent link: https://www.econbiz.de/10010326614
Persistent link: https://www.econbiz.de/10010326621
Persistent link: https://www.econbiz.de/10010326623
There has been a recent debate in the marketing literature concerning the possible mispricing of customer satisfaction. While earlier studies claim that portfolios with attractive out-of-sample properties can be formed by loading on stocks whose firms enjoy high customer satisfaction, later...
Persistent link: https://www.econbiz.de/10010331922