Research Article
Competition Equilibrium Analysis of China’s Luxury Car Market Based on Three-Dimensional Grey Lotka–Volterra Model
Table 1
Grey transformation data of BMW sales volume.
| Year-month | X(0) (k) | X(S) (k) | X(1) (k) | X(CG) (k) | ARMA | Year-month | X(0) (k) | X(S) (k) | X(1) (k) | X(CG) (k) | ARMA |
| 2016-1 | 27663 | | | | | | | | | | | 2016-2 | 13103 | | 24175 | | 27077 | 2018-8 | 36698 | 34054 | 37913 | 36222 | 33225 | 2016-3 | 24324 | 21697 | 24541 | 23520 | 12538 | 2018-9 | 37638 | 36052 | 38486 | 37392 | 36098 | 2016-4 | 21736 | 19721 | 24912 | 22123 | 23743 | 2018-10 | 46925 | 40420 | 39067 | 42138 | 37037 | 2016-5 | 24192 | 23417 | 25288 | 24299 | 21159 | 2018-11 | 51460 | 45341 | 39658 | 45486 | 46310 | 2016-6 | 25693 | 23874 | 25670 | 25079 | 23611 | 2018-12 | 41815 | 46733 | 40257 | 42935 | 50839 | 2016-7 | 24802 | 24896 | 26058 | 25252 | 25110 | 2019-1 | 53289 | 48855 | 40865 | 47670 | 41208 | 2016-8 | 28124 | 26206 | 26452 | 26927 | 24220 | 2019-2 | 32929 | 42678 | 41483 | 39030 | 52665 | 2016-9 | 30709 | 27878 | 26852 | 28480 | 27537 | 2019-3 | 49482 | 45233 | 42110 | 45608 | 32335 | 2016-10 | 25276 | 28036 | 27257 | 26857 | 30118 | 2019-4 | 49945 | 44119 | 42746 | 45603 | 48863 | 2016-11 | 31125 | 29037 | 27669 | 29277 | 24693 | 2019-5 | 46602 | 48676 | 43392 | 46223 | 49326 | 2016-12 | 26461 | 27621 | 28087 | 27390 | 30534 | 2019-6 | 42315 | 46287 | 44048 | 44217 | 45988 | 2017-1 | 31586 | 29724 | 28512 | 29941 | 25877 | 2019-7 | 45710 | 44876 | 44713 | 45100 | 41707 | 2017-2 | 26287 | 28111 | 28943 | 27780 | 30994 | 2019-8 | 47644 | 45223 | 45389 | 46085 | 45097 | 2017-3 | 32279 | 30051 | 29380 | 30570 | 25703 | 2019-9 | 49631 | 47662 | 46075 | 47789 | 47028 | 2017-4 | 34835 | 31134 | 29824 | 31931 | 31686 | 2019-10 | 48862 | 48712 | 46771 | 48115 | 49012 | 2017-5 | 31505 | 32873 | 30275 | 31551 | 34238 | 2019-11 | 53951 | 50815 | 47478 | 50748 | 48244 | 2017-6 | 27566 | 31302 | 30732 | 29867 | 30913 | 2019-12 | 52577 | 51797 | 48195 | 50856 | 53326 | 2017-7 | 30050 | 29707 | 31197 | 30318 | 26980 | 2020-1 | 48432 | 51653 | 48924 | 49670 | 51954 | 2017-8 | 32888 | 30168 | 31668 | 31575 | 29460 | 2020-2 | 8039 | 36349 | 49663 | 31350 | 47815 | 2017-9 | 34496 | 32478 | 32147 | 33040 | 32294 | 2020-3 | 43263 | 33245 | 50414 | 42307 | 7482 | 2017-10 | 30420 | 32601 | 32632 | 31885 | 33900 | 2020-4 | 56204 | 35835 | 51175 | 47738 | 42654 | 2017-11 | 38097 | 34338 | 33126 | 35187 | 29830 | 2020-5 | 57903 | 52457 | 51949 | 54103 | 55576 | 2017-12 | 35548 | 34688 | 33626 | 34621 | 37495 | 2020-6 | 46597 | 53568 | 52734 | 50966 | 57272 | 2018-1 | 43524 | 39056 | 34134 | 38905 | 34950 | 2020-7 | 63596 | 56032 | 53531 | 57720 | 45983 | 2018-2 | 24968 | 34680 | 34650 | 31433 | 42914 | 2020-8 | 65558 | 58584 | 54340 | 59494 | 62957 | 2018-3 | 35569 | 34687 | 35174 | 35143 | 24386 | 2020-9 | 56350 | 61835 | 55161 | 57782 | 64916 | 2018-4 | 36233 | 32257 | 35705 | 34732 | 34971 | 2020-10 | 47166 | 56358 | 55994 | 53173 | 55721 | 2018-5 | 35516 | 35773 | 36245 | 35844 | 35634 | 2020-11 | 61219 | 54912 | 56840 | 57657 | 46551 | 2018-6 | 31644 | 34464 | 36792 | 34300 | 34918 | 2020-12 | 54834 | 54406 | 57699 | 55647 | 60583 | 2018-7 | 33820 | 33660 | 37348 | 34943 | 31052 | 2021-1 | 73333 | 63129 | 58571 | 65011 | 54208 |
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