Abstract
Along with the quick development of e-commerce, different payment schemes are provided to online consumers to improve their shopping experience. Currently, the payment schemes can be divided into two categories, one is pay-to-order, and the other is pay-on-delivery. Payment scheme directly affects consumers’ behavior and e-tailer’s pricing decision in e-commerce. In this paper, we characterize the consumers’ purchase and returns behavior with consumer utility function, build the e-tailer’s profit functions and solve them to obtain the optimal pricing decisions, both in the condition of pay-to-order and dual scheme (including both pay-to-order and pay-on-delivery). We find that managers can affect consumers’ decision on choosing payment scheme by adjusting the e-tail price. We demonstrate the transfer of payment scheme, along with the transaction cost and return cost. Sensitivity analysis is provided to tell e-commerce managers that they should consider the influence of the e-purchase cost, together with the characteristic of both consumers and products when designing the payment scheme.
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Acknowledgement
This work was supported by the grants from the NSFC (71671054 and 7137106) and Shandong Province Social Science Planning Research Project (17DGLJ11).
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Appendix
Appendix
1.1 Proof of Proposition 1
According to Figs. 2, 3 and 4, we can get, that ① when \( \beta_{od} > 2\bar{\beta } \), we can always get \( S_{1} (\beta ) > S_{2} (\beta ) \), which means that all consumers will choose pay-to-order. Under this condition, \( 0 < p_{d} < \frac{{\alpha - 2\bar{\beta }}}{H} \). ② When \( 0 \le \beta_{od} \le 2\bar{\beta } \) and \( S_{2} (\beta ) > 0 \), we can get \( S_{1} (\beta ) > S_{2} (\beta ) \) if with \( \beta \sim (0,\beta_{od} ) \), indicating that consumers will choose pay-to-order; \( S_{1} (\beta ) < S_{2} (\beta ) \) if with \( \beta \sim (\beta_{od} ,2\bar{\beta }) \), indicating that consumers will choose pay-on-delivery. From \( 0 \le \beta_{od} \le 2\bar{\beta } \), we can get \( \frac{{\alpha - 2\bar{\beta }}}{H} \le p_{d} \le \frac{\alpha }{H} \); from \( S_{2} (\beta ) > 0 \), we can get \( p_{d} < \frac{\theta v - \alpha }{\theta (1 + \sigma + \eta )} \). ③ When \( S_{1} (0) < S_{2} (\beta ) \) and \( S_{2} (\beta ) > 0 \), the utility of the consumer choosing pay-on-delivery is always greater than the one choosing pay-to-order, that is, consumers will choose pay-on-delivery. From \( S_{1} (0) = \theta (v - p_{d} ) - \sigma p_{d} - (1 - \theta )\gamma p_{d} < S_{2} (\beta ) = \theta (v - p_{d} - (\sigma + \eta )p_{d} ) - a \), we can get \( p_{d} > \frac{\alpha }{H} \); from \( S_{2} (\beta ) > 0 \), we can get \( p_{d} < \frac{\theta v - \alpha }{\theta (1 + \sigma + \eta )} \). If this situation is reasonable, then there should be \( \frac{\alpha }{H} < \frac{\theta v - \alpha }{\theta (1 + \sigma + \eta )} \). Further simplification can be obtained, that is \( \alpha < \frac{\theta vH}{H + \theta (1 + \sigma + \eta )} \).
1.2 Proof of Proposition 2
According to Proposition 1, ① when \( p_{d} \in (0,\hbox{max} \{ 0,\frac{{\alpha - 2\bar{\beta }}}{H}\} ) \), all consumers will choose pay-to-order, that is, \( D = D_{do} = 1 \); ② when \( \frac{\alpha }{H} \le \frac{\theta v - \alpha }{\theta (1 + \sigma + \eta )} \), which means \( \alpha \le \frac{\theta vH}{H + \theta (1 + \sigma + \eta )} \), we can get \( \, p_{d} \in (\hbox{max} \{ 0,\frac{{\alpha - 2\bar{\beta }}}{H}\} ,\frac{\alpha }{H}] \), and both payment methods will be selected under this condition. Here, \( D_{do} = F(\beta_{od} ) = \frac{{\alpha - Hp_{d} }}{{2\bar{\beta }}} \), \( D_{dd} = 1 - D_{do} = \frac{{2\bar{\beta } - \alpha + Hp_{d} }}{{2\bar{\beta }}} \); when \( \frac{\alpha }{H} > \frac{\theta v - \alpha }{\theta (1 + \sigma + \eta )} \), which is \( \alpha > \frac{\theta vH}{H + \theta (1 + \sigma + \eta )} \), furthermore, we can get \( \alpha < \frac{{\theta vH + 2\bar{\beta }\theta (1 + \sigma + \eta )}}{H + \theta (1 + \sigma + \eta )} \) from \( \frac{{\alpha - 2\bar{\beta }}}{H} < \frac{\theta v - \alpha }{\theta (1 + \sigma + \eta )} \); then, we can see \( \, p_{d} \in (\hbox{max} \{ 0,\frac{{\alpha - 2\bar{\beta }}}{H}\} ,\frac{\theta v - \alpha }{\theta (1 + \sigma + \eta )}] \). Under this situation, two payment methods coexist, among which \( D_{do} = F(\beta_{od} ) = \frac{{\alpha - Hp_{d} }}{{2\bar{\beta }}} \) and \( D_{dd} = 1 - D_{do} = \frac{{2\bar{\beta } - \alpha + Hp_{d} }}{{2\bar{\beta }}} \); if \( \frac{\alpha }{H} \ge \frac{\theta v - \alpha }{\theta (1 + \sigma + \eta )} \) and \( \frac{{\alpha - 2\bar{\beta }}}{H} \ge \frac{\theta v - \alpha }{\theta (1 + \sigma + \eta )} \), then \( \alpha \ge \frac{{\theta vH + 2\bar{\beta }\theta (1 + \sigma + \eta )}}{H + \theta (1 + \sigma + \eta )} \); here, we can always get \( S_{1} (2\bar{\beta }) > S_{2} (\beta ) \), which is \( \, D = D_{do} = 1 \); ③ when \( \alpha < \frac{\theta vH}{H + \theta (1 + \sigma + \eta )} \) and \( \frac{\alpha }{H} < p_{d} < \frac{\theta v - \alpha }{\theta (1 + \sigma + \eta )} \), all consumers will choose pay-on-delivery, which is \( D = D_{dd} = 1 \). Taking the above situations into account, the distribution of market demands corresponding to different \( \alpha \) and \( p_{d} \) can be obtained.
1.3 Proof of Proposition 3
① In pay-to-order, according to the retailer’s profit function, when \( \underset{\raise0.3em\hbox{$\smash{\scriptscriptstyle-}$}}{p}_{o} < p_{o} < \bar{p}_{o} \), we can get \( \frac{{\partial^{2} \pi_{1} }}{{\partial p_{o}^{2} }} = - \frac{AB}{{\bar{\beta }}} < 0 \), that is, there is a unique optimal value \( p_{o}^{*} \) that maximizes the profit function value, which satisfies \( \frac{{\partial \pi_{1} }}{{\partial p_{o} }} = \frac{{A\theta v + Bc - 2ABp_{o} }}{{2\bar{\beta }}} = 0 \). Hence, \( p_{o}^{*} = (A\theta v + Bc)/(2AB) \). Substituting x into \( \underset{\raise0.3em\hbox{$\smash{\scriptscriptstyle-}$}}{p}_{o} < p_{o}^{*} < \bar{p}_{o} \), we can get \( \frac{{\theta v - 2\bar{\beta }}}{B} < \frac{A\theta v + Bc}{2AB} < \frac{\theta v}{B} \) and further to simplify it to get \( \frac{{A\theta v - 4A\bar{\beta }}}{B} < c < \frac{A\theta v}{B} \). Substituting \( p_{o}^{*} \) into the market demand function, the profit function can obtain equilibrium market demand and equilibrium profits within this range. ② When \( 0 < p_{o} \le \underset{\raise0.3em\hbox{$\smash{\scriptscriptstyle-}$}}{p}_{o} \), the first derivative of the corporate profit function for retail prices is positive, that is \( \frac{{\partial \pi_{1} }}{{\partial p_{o} }} = A > 0 \), which means the profit is a monotonically increasing function of retail prices. Thus, the profit function gets the maximum value when \( p_{o} \) takes the maximum \( \underset{\raise0.3em\hbox{$\smash{\scriptscriptstyle-}$}}{p}_{o} \), that is \( p_{o}^{*\prime } = (\theta v - 2\bar{\beta })/B \). At this point, the market demand function is \( D_{1}^{\prime } = 1 \), and substituting it into the profit function can be obtained \( \pi_{1}^{*\prime } = Ap_{o} - c \).
1.4 Proof of Corollary 1
According to Proposition 3, we can get: ① When \( c \in ((A\theta v - 4A\bar{\beta })/B,A\theta v/B) \), \( \frac{{\partial p_{o}^{*} }}{\partial c} = \frac{1}{2A} > 0 \), which means \( p_{o}^{*} \) is a monotonically increasing function of \( c \); from \( \frac{{\partial \pi_{1}^{*} }}{\partial c} = \frac{Bc - A\theta v}{{4A\bar{\beta }}} \), we see that \( \frac{{\partial \pi_{1}^{*} }}{\partial c} < 0 \) if with \( c < \frac{A\theta v}{B} \), that is, \( \pi_{1}^{*} \) is a monotonically decreasing function with respect to \( c \) in this region. ② When \( c \in [0,(A\theta v - 4A\bar{\beta })/B] \), \( \frac{{\partial \pi_{1}^{*} }}{\partial c} < 0 \), that is, \( p_{o}^{*\prime } \) is not affected by \( c \); the equation \( \frac{{\partial \pi_{1}^{*'} }}{\partial c} = - 1 < 0 \) indicates that \( \pi_{1}^{*\prime } \) is a monotonically decreasing function about \( c \).
1.5 Proof of Proposition 4
Name \( G = \theta + (\xi - \lambda )(1 - \theta ) \), \( K = \lambda (1 - \theta ) + rt \), \( G + K = A \), \( H = (1 - \theta )(\sigma + \gamma ) - \theta \eta \) and \( H + \theta (1 + \sigma + \eta ) = B \).
Then Eq. (11) can be simplified as \( \pi_{2} = Ap_{d} D_{do} + Gp_{d} D_{dd} - c \).
Case (1) \( 0 < a \le \frac{\theta vH}{B} \)
① When \( \frac{a}{H} \le p_{d} \le \frac{\theta v - \alpha }{\theta (1 + \sigma + \eta )} \), the market demand function satisfies \( D_{d} = D_{dd} = 1 \), \( D_{do} = 0 \). Retailer profit function is \( \pi_{2} = Gp_{d} - c \). Hence, the optimal retail price is \( p_{d}^{*} = p_{dd} = \frac{\theta v - \alpha }{\theta (1 + \sigma + \eta )} \), and the optimal profit function is \( \pi_{dd} = G\frac{\theta v - \alpha }{\theta (1 + \sigma + \eta )} - c \). ② When \( a > 2\bar{\beta } \) and \( \frac{{a - 2\bar{\beta }}}{H} < p_{d2} < \frac{\alpha }{H} \), retailer profit function is \( \pi_{2} = Ap_{d} \frac{{\alpha - Hp_{d} }}{{2\bar{\beta }}} + Gp_{d} \frac{{2\bar{\beta } - \alpha + Hp_{d} }}{{2\bar{\beta }}} - c \); with further simplification, we can get \( \pi_{2} = \frac{1}{{2\bar{\beta }}}[(G - A)Hp_{d}^{2} + (2\bar{\beta } - \alpha )Gp_{d} + Aap_{d} ] - c \) and the first derivative of the price \( \frac{{\partial \pi_{2} }}{{\partial p_{d} }} = \frac{1}{{2\bar{\beta }}}[2(G - A)Hp_{d} + (2\bar{\beta } - \alpha )G + Aa] \). Since the second derivative of the profit function with respect to price is \( \frac{{\partial \pi_{2}^{2} }}{{\partial^{2} p_{d} }} = \frac{1}{{\bar{\beta }}}(G - A)H < 0 \), there is a unique optimal solution that maximizes the profit function value, which meets \( \frac{{\partial \pi_{2} }}{{\partial p_{d} }} = \frac{1}{{2\bar{\beta }}}[2(G - A)Hp_{d} + (2\bar{\beta } - \alpha )G + Aa] = 0 \), and we can get the optimal price \( p_{d2} = \frac{\alpha }{2H} + \frac{{G\bar{\beta }}}{KH} \). Let \( p_{d2} > \frac{{\alpha - 2\bar{\beta }}}{H} \), and substituting it into the above formula can achieve \( a < 4\bar{\beta } + \frac{{2\bar{\beta }G}}{K} \); let \( p_{d2} < \frac{\alpha }{H} \), and substituting it into the above formula can achieve \( a > \frac{{2\bar{\beta }G}}{K} \). Therefore, we can get \( \hbox{max} \{ 2\bar{\beta },\frac{{2\bar{\beta }G}}{K}\} < a \le \hbox{min} \{ \frac{\theta vH}{B},4\bar{\beta } + \frac{{2\bar{\beta }G}}{K}\} \). ③ When \( 0 < a < 2\bar{\beta } \) and \( 0 < p_{d2} < \frac{a}{H} \), the optimal retail price is \( p_{d2} = \frac{\alpha }{2H} + \frac{{G\bar{\beta }}}{KH} \). Let \( p_{d2} < \frac{\alpha }{H} \), we can get \( a > \frac{{2\bar{\beta }G}}{K} \); then, \( \frac{{2\bar{\beta }G}}{K} < a \le \hbox{min} \{ \frac{\theta vH}{B},2\bar{\beta }\} \). Combining ② and ③, there is \( \frac{{2\bar{\beta }G}}{K} < a < \hbox{min} \{ \frac{\theta vH}{B},2\bar{\beta }\} \). ④ When \( a > 2\bar{\beta } \) and \( 0 < p_{do} \le \frac{{a - 2\bar{\beta }}}{H} \), \( D_{d} = D_{do} = 1 \), retailer profit function is \( \pi_{2} = Ap_{do} D_{do} - c \). Therefore, the optimal retail price is \( p_{do} = \frac{{\alpha - 2\bar{\beta }}}{H} \), and the optimal profit function is \( \pi_{2} = A\frac{{\alpha - 2\bar{\beta }}}{H} - c \).
Case (2) \( \frac{\theta vH}{B} < \alpha < \frac{{\theta vH + 2\bar{\beta }\theta (1 + \sigma + \eta )}}{B} \)
① When \( a > 2\bar{\beta } \) and \( \frac{{a - 2\bar{\beta }}}{H} < p_{d} < \frac{\theta v - \alpha }{\theta (1 + \sigma + \eta )} \), similar to the proof process of scenario (1), the retailer’s optimal retail price satisfies \( p_{d2} = \frac{\alpha }{2H} + \frac{{G\bar{\beta }}}{KH} \). Let \( p_{d2} < \frac{\theta v - \alpha }{\theta (1 + \sigma + \eta )} \), we can get \( a < \frac{{2\theta KHv - 2\theta \bar{\beta }G(1 + \sigma + \eta ))}}{K(H + B)} \); combining the previous proof, we can get \( a < 4\bar{\beta } + \frac{{2\bar{\beta }G}}{K} \) from \( p_{d} > \frac{{a - 2\bar{\beta }}}{H} \). Hence, \( \hbox{max} \{ 2\bar{\beta },\frac{\theta vH}{B}\} < a < \hbox{min} \{ \frac{{\theta vH + 2\bar{\beta }\theta (1 + \sigma + \eta )}}{B},4\bar{\beta } + \frac{{2\bar{\beta }G}}{K},\frac{{2\theta KHv - 2\theta \bar{\beta }G(1 + \sigma + \eta ))}}{K(H + B)}\} \).
② When \( a < 2\bar{\beta } \) and \( 0 < p_{d} < \frac{\theta v - \alpha }{\theta (1 + \sigma + \eta )} \), the retailer’s optimal price is \( p_{d2} = \frac{\alpha }{2H} + \frac{{G\bar{\beta }}}{KH} \), and we also get \( a < \frac{{2\theta KHv - 2\theta \bar{\beta }G(1 + \sigma + \eta ))}}{K(H + B)} \). Therefore, \( \frac{\theta vH}{B} < a < \hbox{min} \{ 2\bar{\beta },\frac{{2\theta KHv - 2\theta \bar{\beta }G(1 + \sigma + \eta ))}}{K(H + B)}\} \).
③ When \( a \ge 2\bar{\beta } \) and \( 0 < p_{d} \le \frac{{a - 2\bar{\beta }}}{H} \), the retailer’s optimal retail price meets \( p_{do} = \frac{{\alpha - 2\bar{\beta }}}{H} \) and the corresponding optimal profit function is \( \pi_{do} = A\frac{{\alpha - 2\bar{\beta }}}{H} - c \).
Case (3) \( \alpha \ge \frac{{\theta vH + 2\bar{\beta }\theta (1 + \sigma + \eta )}}{B} \)
Combining with Proposition 2, we know that, under this condition, consumers choose pay-to-order to purchase online, so the optimal retail price is \( p_{do} = \frac{{\theta v - 2\bar{\beta }}}{B} \), and the corresponding profit is \( \pi_{do} = A\frac{{\theta v - 2\bar{\beta }}}{B} - c \).
Integrating above cases (1), (2) and (3), we can obtain the optimal retail prices and profits under different circumstances, as shown in Table 1.
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Zhang, J., Xu, N. & Bai, S. The optimal pricing decisions for e-tailers with different payment schemes. Electron Commer Res 21, 955–982 (2021). https://doi.org/10.1007/s10660-020-09396-2
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DOI: https://doi.org/10.1007/s10660-020-09396-2