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\(w\)
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Wholesale price of products sold by cross-border suppliers to cross-border e-commerce enterprises
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\(r\)
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Cross-border suppliers mark up their products and sell them to retailers
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\(P1\)
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Price of cross-border e-commerce online channel products (domestic delivery)
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\(P2\)
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Cross-border e-commerce offline channel product price (offline physical store)
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\(T\)
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Stipulated delivery time of products sold by cross-border e-commerce through online channels
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\(t\)
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Actual arrival time of cross-border e-commerce products sold through online channels
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\(\alpha\)
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The estimated utility of a product by a consumer means that the consumer has estimated the quality, material and other characteristics of the product before receiving the product
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\(\lambda\)
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The consumer's use experience of the product indicates the impact of contact with the product on the estimated value of the product, \(0 \le \lambda \le 1\)
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\(S_{1}\)
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Consumers' satisfaction of purchasing products through cross-border e-commerce online channels
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\(S_{2}\)
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Consumers' satisfaction of purchasing products through cross-border e-commerce offline channels
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\(\eta\)
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Consumer sensitivity index of cross-border logistics speed, \(0 < \eta < 1\)
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\(\beta\)
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When consumers purchase cross-border products offline, the inconvenience costs such as time and travel caused by the distance are too far, \(\beta > 1\)
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\(a\)
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Tariff cost in the process of cross-border product transportation
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\(b\)
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Unit penalty cost of cross-border products not arriving on schedule, \(b > 1\)
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\(k\)
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Product storage service cost coefficient
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\(\theta\)
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The cost ratio of online channel to offline channel
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\(z\)
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Proportion of revenue shared by offline channels to online channels
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\(Q_{1}\)
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Consumer demand for online channels of cross-border products
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\(Q_{2}\)
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Consumer demand for offline channels of cross-border products
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\(\pi_{sc}\)
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Supply chain system profit
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\(\pi_{1}\)
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Online channel profit of cross-border e-commerce
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\(\pi_{2}\)
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Cross-border e-commerce offline channel profit
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