Incorporating Latent Variables into Discrete Choice Models - A Simultaneous Estimation Approach Using SEM Software

Integrated choice and latent variable (ICLV) models represent a promising new class of models which merge classic choice models with the structural equation approach (SEM) for latent variables. Despite their conceptual appeal, applications of ICLV models in marketing remain rare. We extend previous ICLV applications by first estimating a multinomial choice model and, second, by estimating hierarchical relations between latent variables. An empirical study on travel mode choice clearly demonstrates the value of ICLV models to enhance the understanding of choice processes. In addition to the usually studied directly observable variables such as travel time, we show how abstract motivations such as power and hedonism as well as attitudes such as a desire for flexibility impact on travel mode choice. Furthermore, we show that it is possible to estimate such a complex ICLV model with the widely available structural equation modeling package Mplus. This finding is likely to encourage more widespread application of this appealing model class in the marketing field.

EU Commission: Comments on the “Opinion of European Academics on Anti-Counterfeiting Trade Agreement”

The “Opinion of European Academics on Anti-Counterfeiting Trade Agreement” (ACTA) of February 11, 2011, was published in 2 JIPITEC 65 (2011). Signed by more than 25 law professors and academics from across Europe who specialize in the field, this opinion addressed the following concern: Although it is uncontested that the infringement of intellectual property rights, especially in the Internet, prejudices the legitimate interests of right holders, it is still very controversial in Europe and abroad whether the enforcement standards of ACTA are balanced. The European Commission, DG Trade, has now published a document with detailed comments on the Opinion. The comments, which are also available on the website of the European Commission [http://trade.ec.europa.eu/doclib/ html/147853.htm], are republished here with the kind permission of the European Commission.