Mixed Methodological Approaches: From Purely Analytical to Analytical Plus Empirical. In our database, a small number (29) of analytical studies also include empirical analyses to further validate their findings by primarily using secondary data (e.g., Ailawadi, Borin, and Farris, 1995; Besanko, Dubé, andGupta, 2003). An alternative approach to derive broader insights is to use an econometric analysis to summarize findings across several pure analytical models. A good example of this approach is the work by Lee et al. (2013) wherein they use a meta-analysis to summarize analytical results from ten different channel structures. This approach can be considered an important first step in developing an overarching theory of channel structure design.