Price and Variety in the Spokes Model

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Verti-Zontal Differentiation in Export Markets (2013, background): “When preferences exhibit a love-for-variety as in (2), consumers may visit several shops and can buy several units (see Hart, 1985, and Chen and Riordan, 2007) of different varieties of a good.”
When Showrooming Increases Retailer Profit (2018, result): “Our article is also related to recent studies on when the entry of a competitor into the market increases the profits of the incumbents (e.g., Chen and Riordan 2007; Ishibashi and Matsushima 2009; Pazgal, Soberman, and Thomadsen 2016).”
Competition in Pricing Algorithms (2020, methodology): “In this way, the model is related to the pyramid model of von UngernSternberg (1991) and the spokes model of Chen and Riordan (2007). However, unlike von Ungern-Sternberg (1991) and Chen and Riordan (2007), our approach allows for the mass of consumers on each segment to be different, including the ”
Price‐increasing competition (2008, background): “An alternative formulation of su¢ cient conditions for Assumption 2 is based on the function (p; p) = j p) @p j q(p; p) : (7)”
Price Coherence and Excessive Intermediation (2015, background): “Each buyer incurs a cost ci of joining M i, where ci is i.i.d. across intermediaries from the same distribution G(c) with c ∈ [0, c].”