Spatial correlation regarding growth rate

[Michael Schuster]

Hi community,

I am currently checking for spatial correlation in my variables. With the -spatcorr- command I do get nice graphs with my variables (nighttime lights or population density) but not with my GDP growth rate. The table with Moran's I is empty. Yet, I do get with my GDP variable. Is there a reason for it?

* Example generated by -dataex-. For more info, type help dataex
clear
input long grid_id double(longitude latitude GDP_PPP_total) float growth_GDP_PPP_total double population_density byte radiance_full float(maxlong minlong maxlat minlat band)
 985020 10.3541666668218 5.06249999976653  1056049.875  .0860122 6.04671335220337  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 835603 4.77083333346419  8.4374999997514     21665290  .5571461 375.124847412109  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 762004 9.81250000015275 10.1041666664106     21974830  .5167959 120.575950622559  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 796886 4.18750000012832 9.31249999974748   3490320.25 .51672524  15.307035446167  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 833820 7.27083333347504 8.47916666641788      9927731  .4974357 48.5483016967773  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 857840 9.81250000015275 7.93749999975364      9882970  .5074189 61.8769264221191  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 841173 6.47916666680494 8.31249999975196    5448354.5 .51781154  56.366641998291  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 843027 6.93750000014026 8.27083333308548     11314635  .5733555 75.2605133056641  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 922223 4.72916666679734 6.47916666642685    113897120  .6981721 292.893463134766  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 931555 9.60416666681851 6.27083333309445      2240421 .10476764 19.7397937774658  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 772983 6.52083333347179 9.85416666641171      9175780 .55051684 43.4493713378906  0 11.0625 2.729167 10.3125 1.9791666 11.785113
1071649 10.6875000001565 3.10416666644198 1042344.0625   .128374 22.9463710784912  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 889030 3.93750000012724 7.22916666642348     44210304  .6529513 256.928070068359  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 830210 10.4375000001555 8.56249999975084     19033606 .50308126 40.2781524658203  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 887303 8.77083333348155 7.27083333308996     47921520  .5031346 181.617401123047  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 966561 9.14583333348318 5.47916666643133   3863072.25 .11408315 19.7397918701172  0 11.0625 2.729167 10.3125 1.9791666 11.785113
1007029 5.89583333346907 4.56249999976878     74845072  .6902592 122.841934204102 59 11.0625 2.729167 10.3125 1.9791666 11.785113
 806109 4.52083333346311 9.10416666641508   2677714.25  .5109278 15.3070373535156  0 11.0625 2.729167 10.3125 1.9791666 11.785113
1003361 6.64583333347233 4.64583333310174     50409128  .6414611 186.602645874023 47 11.0625 2.729167 10.3125 1.9791666 11.785113
 830068 4.52083333346311 8.56249999975084    392694752  .6235943 1072.21984863281  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 822762 7.27083333347504 8.72916666641676    5369140.5 .52271914 51.9646606445312  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 892852 9.60416666681851 7.14583333309053     31589738  .4947786 79.5925369262695  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 903780 4.18750000012832 6.89583333309165      3640810  .6123202 48.0174369812012  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 861427 5.68750000013484 7.85416666642068     18450436  .5553483 94.4367065429688  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 885365 4.81250000013104 7.31249999975644     47528408  .6567479 127.758445739746  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 984989 9.06250000014948 5.06249999976653   3995756.75 .11462297 18.2725963592529  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 765597 5.93750000013592 10.0208333330776     12975120  .5448935 22.9209098815918  0 11.0625 2.729167 10.3125 1.9791666 11.785113
1036625 10.3958333334886  3.8958333331051  1038069.375 .04817374 18.4175605773926  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 769372 9.64583333348535 9.93749999974467     25624274  .4911516 97.7500839233398  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 918572 6.18750000013701 6.56249999975981    146312880  .6993072     212.58984375  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 953641 8.35416666681308 5.77083333309669  621414.3125  .4020025 90.1043853759766  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 894660 8.14583333347884 7.10416666642405     59043908  .5076667 192.997650146484  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 754579 7.60416666680982 10.2708333330765     12056255  .5627589 59.9255905151367  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 758161 3.27083333345768 10.1874999997436     10548402  .3930731 32.3390884399414  0 11.0625 2.729167 10.3125 1.9791666 11.785113
1102971 10.3125000001549 2.39583333311183      2484001 .14279568 15.5514755249023  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 979420 7.39583333347559 5.18749999976598    248892096  .5053491 506.034698486328  7 11.0625 2.729167 10.3125 1.9791666 11.785113
 835709 9.18750000015003  8.4374999997514      9708269  .4846926 46.8951263427734  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 922250 5.85416666680223 6.47916666642685     15215403  .6449252 58.3421325683594  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 994244 10.7291666668234 4.85416666643414   1490431.25 .07867102 27.0410861968994  0 11.0625 2.729167 10.3125 1.9791666 11.785113
1106670 10.8541666668239 2.31249999977886    1371887.5 .13290831  9.5992259979248  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 962845 7.89583333347775 5.56249999976429    171112256 .49655575 217.469131469727  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 927773 5.60416666680114 6.35416666642741   2524675840  .7702747 2327.39892578125 57 11.0625 2.729167 10.3125 1.9791666 11.785113
 903924 10.1875000001544 6.89583333309165    2956854.5 .10496145 32.7732696533203  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 881734 7.10416666680765  7.3958333330894     80613720  .5880374 108.689125061035  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 778445   3.729166666793 9.72916666641228   2901369.75   .512714 19.3551540374756  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 844815 4.64583333346365   8.229166666419     30811566  .5650612 191.712829589844  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 752730 7.35416666680874  10.312499999743     21170852 .54654676 74.6544647216797  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 767385 3.64583333345931 9.97916666641115      8134921 .53539467  19.355152130127  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 793173 3.06250000012344 9.39583333308044    1668974.5 .35691455 23.6109619140625  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 986748 5.56250000013429 5.02083333310005     33317540  .6455162 145.998657226562 52 11.0625 2.729167 10.3125 1.9791666 11.785113
 826355 3.39583333345822  8.6458333330838    409419840   .695146 109.756713867188  5 11.0625 2.729167 10.3125 1.9791666 11.785113
 808049 8.56250000014732  9.0624999997486     23653456  .5211044 95.6928024291992  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 972066 8.14583333347884 5.35416666643189     13656840  .4660149 133.999771118164  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 913045  6.2708333334707 6.68749999975925    328066080  .7191448 342.456298828125  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 778598 10.1041666668207 9.72916666641228      9523490  .4810962 53.0827331542969  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 813582 8.72916666681471 8.93749999974916    5534987.5   .501012 59.5584754943848  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 887223 5.43750000013375 7.27083333308996    138702864  .6932423 241.179748535156  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 791488 9.64583333348535 9.43749999974692     21054438  .5182509    94.2275390625  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 807914  2.9375000001229  9.0624999997486     18871094 .55408305 19.3551540374756  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 758208 5.22916666679951 10.1874999997436      3277453 .52699584 22.9209098815918  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 761896 5.31250000013321 10.1041666664106    4467789.5 .53382957 22.9209098815918  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 979375 5.52083333346745 5.18749999976598      9651739  .6544194 116.653686523438  5 11.0625 2.729167 10.3125 1.9791666 11.785113
 953667 9.43750000015111 5.77083333309669      2141632 .10451582 19.7397918701172  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 865113 5.68750000013484 7.77083333308772    235422944  .6135235 608.705383300781  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 981325 9.97916666682013 5.14583333309949     76910216 .15686934 97.3607788085938  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 948166 10.6041666668228 5.89583333309613    5339330.5 .23670833 184.154724121094  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 920465 8.27083333347938 6.52083333309333     67644712 .49203175 209.737747192383  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 874342  6.2708333334707 7.56249999975532     86608632  .5896898 293.718780517578  5 11.0625 2.729167 10.3125 1.9791666 11.785113
 857672 2.81250000012236 7.93749999975364     11277687  .6387892 50.6512489318848  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 990453  6.3541666668044 4.93749999976709    697872128  .7202488  428.21728515625 44 11.0625 2.729167 10.3125 1.9791666 11.785113
 828368 10.4791666668223 8.60416666641732    4099638.5  .4681441 40.2781524658203  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 852320 10.1875000001544 8.06249999975308     12633788  .5044679 61.8769226074219  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 933394 9.43750000015111 6.22916666642797    4536658.5 .11623125 19.7397937774658  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 911306 10.6041666668228 6.72916666642573      6902725 .11875078 63.7403717041016  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 785974 10.2708333334881 9.56249999974635     11074497 .50422907  53.847526550293  0 11.0625 2.729167 10.3125 1.9791666 11.785113
1058734 10.1041666668207 3.39583333310734      3538957 .14895342 15.5514764785767  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 826494 9.18750000015003  8.6458333330838     12014669  .4892813 80.4083099365234  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 890960 7.56250000014298 7.18749999975701     96494656  .5921526 126.955436706543  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 894604 5.81250000013538 7.10416666642405     13012525   .667151 92.5847015380859  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 992305 6.72916666680602 4.89583333310062     53207772  .6190481 261.211669921875  9 11.0625 2.729167 10.3125 1.9791666 11.785113
 780408 8.72916666681471  9.6874999997458     37103732 .50188845 668.109558105469  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 929693  8.8125000001484 6.31249999976093     20808088  .4749977 62.0056800842285  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 798887 10.7708333334902   9.270833333081    4354752.5 .51769024 27.9248352050781  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 924048 3.97916666679409 6.43749999976037    136379552  .6328335 252.738265991211  4 11.0625 2.729167 10.3125 1.9791666 11.785113
 826408 5.60416666680114  8.6458333330838      9401922  .5385192 36.6986351013184  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 773059  9.6875000001522 9.85416666641171     30793924  .4941314 97.7500839233398  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 914945 8.64583333348101 6.64583333309277     70763960  .5013317 116.231315612793  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 900185 7.97916666681145 6.97916666642461     38741632  .4985074 199.902893066406  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 793338 9.93750000015329 9.39583333308044     47534952  .5079342 53.8475303649902  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 924192 9.97916666682013 6.43749999976037   3588884.75 .10857858 33.7573547363281  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 905738 8.97916666681579 6.85416666642517     74024280  .5125887 291.266998291016  0 11.0625 2.729167 10.3125 1.9791666 11.785113
1121413 10.8125000001571 1.97916666644703     37091268 1.0665932 49.4520263671875  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 844924 9.18750000015003   8.229166666419     13998205  .4869421 41.7423667907715  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 937008 6.43750000013809 6.14583333309501     31798038  .6608627 158.326187133789  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 885480 9.60416666681851 7.31249999975644     26459602   .490964 81.5406723022461  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 837446 4.77083333346419 8.39583333308492     29378088 .56399566 579.818298339844  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 800710 9.93750000015329 9.22916666641452      8671730  .4989026 40.5917205810547  0 11.0625 2.729167 10.3125 1.9791666 11.785113
1067945 9.93750000015329 3.18749999977494  1600116.625 .13393798 15.5514764785767  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 887250 6.56250000013863 7.27083333308996    3180992.5 .50534344 97.7508773803711  0 11.0625 2.729167 10.3125 1.9791666 11.785113
 955413  5.3958333334669 5.72916666643021     16239514  .6805054 77.7608642578125 43 11.0625 2.729167 10.3125 1.9791666 11.785113
end

and

spatcorr growth_GDP_PPP_total , bands(0(1)12) xcoord(longitude) ycoord(latitude) graph