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Haupt, Harry and Kagerer, Kathrin (2012) Beyond mean estimates of price and promotional effects in scanner-panel sales–response regression. Journal of Retailing and Consumer Services 19 (5), pp. 470-483.
Haupt, Harry and Kagerer, Kathrin and Schnurbus, Joachim (2011) Cross-validating fit and predictive accuracy of nonlinear quantile regressions. Journal of Applied Statistics 38 (12), pp. 2939-2954.
Kagerer, Kathrin (2013) A short introduction to splines in least squares regression analysis. Regensburger Diskussionsbeiträge zur Wirtschaftswissenschaft 472, Working Paper, University of Regensburg, Faculty of Business, Economics and Management Information Systems, Regensburg.