Wechselberger, Peter; Lang, Stefan; Steiner, Winfried J. - Institut für Finanzwissenschaft, Fakultät für … - 2007
factor. Additionally, monotonicity constraints on the nonlinear functions are possible. Our work is motivated by the …-item price response functions flexibly to represent nonlinearities and irregular pricing effects in sales response. Monotonicity … constraints are imposed so that a brand's own price is inversely related and the prices of competing brands are directly related …