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Price Promotions and Brand Loyalty: Empirical Evidence for the German Breakfast Cereals Market

Empen, Janine; Loy, Jens-Peter; Weiss, Christoph R. - 2011

Price promotions are important marketing activities for (food) retailers; brand loyalty is a major requisite to foster brands' assets. Several theoretical papers have analyzed the relationship between price promotions and brand loyalty resulting in mixed or perhaps contradictory outcomes; only a...

Persistent link: https://www.econbiz.de/10009446177

Endogenous variables and weak instruments in cross-sectional nutrient demand and health information analysis: a comparison of solutions

Davis, George C. (contributor) - 2003

dealing with the endogeneity of health information knowledge. The standard approach for dealing with this problem is an … the types of data sets that contain health information and nutrient intakes because the instruments are not sufficiently … correlated with the endogenous variables (i.e., instruments are weak). This thesis compares the reliability of the IV procedure …

Persistent link: https://www.econbiz.de/10009465204

Accrual Noise Ratio as a Measure of Accrual Reliability

Njoroge, Kenneth - 2009

I develop an empirical model that estimates a firm-specific accrual noise ratio (ANR), an operational and statistically grounded measure of accrual reliability, and test the measure's construct validity. The model allows accrual reliability to vary across firms, which is particularly important...

Persistent link: https://www.econbiz.de/10009475468

Semiparametric Estimation with Generated Covariates

Mammen, Enno; Rothe, Christoph; Schienle, Melanie - 2011

In this paper, we study a general class of semiparametric optimization estimators of a vector-valued parameter. The criterion function depends on two types of in nite-dimensional nuisance parameters: a conditional expectation function that has been estimated nonparametrically using generated...

Persistent link: https://www.econbiz.de/10009467126

Determination of the optimal number of strata for bias reduction in propensity score matching.

Akers, Allen - 2010

Previous research implementing stratification on the propensity score has generally relied on using five strata, based on prior theoretical groundwork and minimal empirical evidence as to the suitability of quintiles to adequately reduce bias in all cases and across all sample sizes. This study...

Persistent link: https://www.econbiz.de/10009475025

Evaluation Strategies in Labor Economics -- An Application to Post-Secondary Education

Augurzky, Boris - 2000

Die Evaluierung der Investitionen in Ausbildung undihrer Wirkungen auf den Arbeitsmarkt ist in modernen Gesellschaften von zentralemInteresse. Gewöhnlich ist die Meinung gegenüber der ökonomischen und gesellschaftlichenRendite der Ausbildung positiv: ein Mehr an Ausbildung zieht eine...

Persistent link: https://www.econbiz.de/10009476276

Too Much Ado about Instrumental Variable Approach: Is the Cure Worse than the Disease?

Baser, Onur - 2009

instruments may produce inconsistent and inefficient results. Methods: We use two IVs and apply Shea's partial R -square method …, the Anderson canonical correlation, and Cragg–Donald tests to check for weak instruments. Hall–Peixe tests are applied to … see if any of these instruments are redundant in the analysis. Results: A total of 14,952 asthma patients from the …

Persistent link: https://www.econbiz.de/10009476533

Disentangling Treatment Effects of Polish Active Labor Market Policies: Evidence from Matched Samples

Kluve, Jochen; Lehmann, Hartmut; Schmidt, Christoph M. - 2002

This paper estimates causal effects of two Polish active labor market policies - Training and Intervention Works - on employment probabilities. Using data from the 18th wave of the Polish Labor Force Survey we discuss three stages of an appropriately designed matching procedure and demonstrate...

Persistent link: https://www.econbiz.de/10009476693

Correcting verification bias in the assessment of the accuracy of diagnostic tests

He, Hua (1969; McDermott, Michael P.; Huang, Li-shan

Thesis (Ph.D.)--University of Rochester. School of Medicine and Dentistry. Dept. of Biostatistics and Computational Biology, 2007.

Persistent link: https://www.econbiz.de/10009482975

Cost-efficient Variable Selection Using Branching LARS

Yue, Li Hua - 2010

Variable selection is a difficult problem in statistical model building. Identification of cost efficient diagnostic factors is very important to health researchers, but most variable selection methods do not take into account the cost of collecting data for the predictors. The trade off between...

Persistent link: https://www.econbiz.de/10009447237