Search Results - subject:"Linear transformation"

A reverse logistics network model for handling returned products

Zaarour, Nizar; Melachrinoudis, Emanuel; Solomon, Marius M. - In: Inventi impact: supply chain & logistics (2015) 1, pp. 18-27

Persistent link: https://www.econbiz.de/10011377423

Empirical research of multi-criteria decision making methods used to evaluate bids for public contracts in the Czech Republic

Vrbova, Lucie - In: International journal of management and decision making … 14 (2015) 4, pp. 289-303

Persistent link: https://www.econbiz.de/10011610279

The linear formulation of the ZSG-DEA models with different production technologies

Bi, Gongbing; Feng, Chenpeng; Ding, Jingjing; Liang, Liang - In: Journal of the Operational Research Society : OR 65 (2014) 8, pp. 1202-1211

Persistent link: https://www.econbiz.de/10010386706

A Reinterpretation of Interactions in Regressions

Hirschberg, J.; Lye, J. - Department of Economics, Faculty of Business and Economics - 2007

Regression specifications in applied econometrics frequently employ regressors that are defined as the product of two other regressors to form an interaction. Unfortunately, the interpretation of the results of these models is not as straight forward as in the linear case. In this paper, we...

Persistent link: https://www.econbiz.de/10005587608

A Simple Test for the Absence of Covariate Dependence in Hazard Regression Models

Bhattacharjee, Arnab - School of Economics and Finance, University of St. Andrews - 2007

Persistent link: https://www.econbiz.de/10005673169

Semiparametric Estimators for the Regression Coefficients inthe Linear Transformation Competing Risks Models with Missing Causeof Failure

Gao, Guozhi - 2006

At Random assumption, we propose two methods to estimate the regression coefficients in the linear transformation models … analyzing survival data, there are circumstances where other models are more appropriate. Here we consider the class of linear … transformation models that contains the proportional hazards model and the proportional odds model as special cases. Sometimes …

Persistent link: https://www.econbiz.de/10009431243

Understanding Advertising Adstock Transformations

Joy, Joseph - Volkswirtschaftliche Fakultät, … - 2006

Advertising effectiveness and Return on Investment (ROI) are typically measured through econometric models that measure the impact of varying levels of advertising Gross Ratings Points (GRPs) on sales or on purchase decision and choice. TV advertising has both dynamic and diminishing returns...

Persistent link: https://www.econbiz.de/10005616749

Analyzing Response Times in Tests With Rank Correlation Approaches

Ranger, Jochen; Kuhn, Jörg-Tobias - In: Journal of Educational and Behavioral Statistics 38 (2013) 1, pp. 61-80

It is common practice to log-transform response times before analyzing them with standard factor analytical methods. However, sometimes the log-transformation is not capable of linearizing the relation between the response times and the latent traits. Therefore, a more general approach to...

Persistent link: https://www.econbiz.de/10011138703

Empirical likelihood for linear transformation models with interval-censored failure time data

Zhang, Zhigang; Zhao, Yichuan - In: Journal of Multivariate Analysis 116 (2013) C, pp. 398-409

equation approach to fit linear transformation models. In this paper, we develop two empirical likelihood (EL) inference … et al. (2005) [40]. The simulation results demonstrate that the EL and jackknife EL methods for linear transformation …

Persistent link: https://www.econbiz.de/10011041904

Principal component histograms from interval-valued observations

Le-Rademacher, J.; Billard, L. - In: Computational Statistics 28 (2013) 5, pp. 2117-2138

The focus of this paper is to propose an approach to construct histogram values for the principal components of interval-valued observations. Le-Rademacher and Billard (J Comput Graph Stat 21:413–432, <CitationRef CitationID="CR24">2012</CitationRef>) show that for a principal component analysis on interval-valued observations, the...</citationref>

Persistent link: https://www.econbiz.de/10010998454