RT Journal T1 Research on Service Strategy in A Gray Market A1 YANG Feng, XU Feng-mei PB Chinese Journal of Management Science FD 2021-02-20 YR 2021 JF Chinese Journal of Management Science JO Chinese Journal of Management Science VO 29 IS 2 SP 9 DO 10.16381/j.cnki.issn1003-207x.2021.02.002 K1 supply chain;gray market;service strategy;Stackelberg competition LK {http://www.zgglkx.com/EN/article/article_17189.shtml}