大家好,使用xthreg命令跑二重门限回归时会得以下门限回归结果,例如使用以下命令
xthreg GVC_Pat_b lfgy_fvas lzilao llcap1 lllab1 nongp , rx(fuwup) qx(shzhjin) thnum(2) bs(150 150) trim(0.05 0.05) grid(400)
得到以下结果:
Threshold estimator (level = 95):
model Threshold Lower Upper
Th-1 0.0035 0.0033 0.0036
Th-21 0.0038 0.0035 0.0038
Th-22 0.0026 0.0022 0.0026
Threshold effect test (bootstrap = 150 150):
Threshold RSS MSE Fstat Prob Crit10 Crit5 Crit1
Single 0.0392 0.0002 15.88 0.0933 14.7904 32.5384 47.8278
Double 0.0375 0.0002 10.74 0.1667 13.6727 17.2761 26.1130
Fixed-effects (within) regression Number of obs = 252
Group variable: industry Number of groups = 18
R-sq: within = 0.7722 Obs per group: min = 14
between = 0.1554 avg = 14.0
overall = 0.2208 max = 14
F(8,226) = 95.78
corr(u_i, Xb) = -0.5184 Prob > F = 0.0000
GVC_Pat_b Coef. Std. Err. t P>t [95% Conf. Interval]
lfgy_fvas .0849112 .0042288 20.08 0.000 .0765782 .0932442
lzilao -.0162315 .0041154 -3.94 0.000 -.0243409 -.0081221
llcap1 -.0422878 .0090078 -4.69 0.000 -.0600378 -.0245378
lllab1 -.0490966 .0057675 -8.51 0.000 -.0604615 -.0377317
nongp -3.555463 .5043842 -7.05 0.000 -4.54936 -2.561565
_cat#c.fuwup
0 1.866213 .3541315 5.27 0.000 1.168391 2.564035
1 2.042707 .384198 5.32 0.000 1.285638 2.799775
2 5.65929 1.01202 5.59 0.000 3.665088 7.653492
_cons .5125504 .0701995 7.30 0.000 .3742211 .6508796
sigma_u .06277259
sigma_e .01288502
rho .95956972 (fraction of variance due to u_i)
F test that all u_i=0: F(17, 226) = 98.84 Prob > F = 0.0000
可看到,双门槛回归p值为 0.1667 应该是没通过双门槛检验,因此应将thnum(2)改为thnum(1),但修改后的命令就是无法运行,提示“number of parameters in trim() is not equal to thnum()!
r(198);


雷达卡






京公网安备 11010802022788号







