我的问题是: 为什么加入变量LRD_GDP以后,LSOFDI3就不显著了。这能说明什么问题?
Dependent Variable: LTFP
Method: Least Squares
Date: 09/04/14 Time: 17:27
Sample (adjusted): 1990 2012
Included observations: 23 after adjustments
Convergence achieved after 20 iterations
Variable
Coefficient
Std. Error
t-Statistic
Prob.
C
-2.536267
0.366203
-6.925846
0.0000
LSFFDI3
0.132194
0.059049
2.238719
0.0380
LSFOFDI3
0.107924
0.040410
2.670748
0.0156
AR(1)
1.115021
0.094239
11.83190
AR(5)
-0.305111
0.077167
-3.953929
0.0009
R-squared
0.986899
Mean dependent var
-0.847227
Adjusted R-squared
0.983988
S.D. dependent var
0.172500
S.E. of regression
0.021828
Akaike info criterion
-4.621596
Sum squared resid
0.008576
Schwarz criterion
-4.374750
Log likelihood
58.14836
Hannan-Quinn criter.
-4.559515
F-statistic
338.9933
Durbin-Watson stat
1.857763
Prob(F-statistic)
0.000000
Date: 09/05/14 Time: 10:14
Convergence achieved after 26 iterations
-1.226698
0.237604
-5.162777
0.0001
LRD_GDP
0.185940
0.024204
7.682167
0.144890
0.023873
6.069118
-0.009160
0.028153
-0.325345
0.7497
1.338566
0.253801
5.274083
AR(2)
-1.120384
0.443406
-2.526769
0.0242
AR(3)
0.608042
0.491542
1.237011
0.2364
AR(4)
-0.371180
0.470472
-0.788953
0.4433
-0.222185
0.258384
-0.859903
0.4043
0.991030
0.985904
0.020480
-4.652525
0.005872
-4.208201
62.50404
-4.540779
193.3400
1.781358
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