RT Journal T1 The Threshold Effect and National Differences of Inbound Tourism on International Trade-An Empirical Study Based on the the Per Capita Income of 41 Countries Along the B&R A1 CHENG Cheng, ZHOU Ze-qi, HONG Kai-bang PB Journal of Guizhou University of Finance and Economics FD 2020-09-15 YR 2020 JF Journal of Guizhou University of Finance and Economics JO Journal of Guizhou University of Finance and Economics VO 38 IS 05 SP 24 DO K1 inbound tourism;international trade;threshold effect;national differences LK {https://gcxb.gufe.edu.cn/EN/article/article_9229.shtml}