黃河泉 发表于 2019-5-12 18:24 
这种问题我回答过上百次了,是按照门槛值大小来排的!
黄老师您好,劳烦你一下哈,请教你一个xthreg(面板门限回归) 的一个有关如何看回归结果的一个问题,_cat#c.c1是什么意思(可从后面的例子中看到)?可以这样理解么:假如只有一个门槛时,_cat#c.c1为0代表门限变量d1<0.0154时核心解释变量的回归系数;_cat#c.c1为1代表d1>0.0154时核心解释变量的回归系数?,具体的例子如下:
. use hansen1999, clear
. xthreg i q1 q2 q3 d1 qd1, rx(c1) qx(d1) thnum(1) grid(400) trim(0.01) bs(300)
Estimating the threshold parameters: 1st ...... Done
Boostrap for single threshold
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Threshold estimator (level = 95):
model Threshold Lower Upper
Th-1 0.0154 0.0141 0.0167
Threshold effect test (bootstrap = 300):
Threshold RSS MSE Fstat Prob Crit10 Crit5 Crit1
Single 17.7818 0.0023 35.20 0.0033 11.9749 14.0259 22.8402
Fixed-effects (within) regression Number of obs = 7910
Group variable: id Number of groups = 565
R-sq: within = 0.0951 Obs per group: min = 14
between = 0.0692 avg = 14.0
overall = 0.0660 max = 14
F(7,7338) = 110.21
corr(u_i, Xb) = -0.3972 Prob > F = 0.0000
i Coef. Std. Err. t P>|t| [95% Conf. Interval]
q1 .0105555 .0008917 11.84 0.000 .0088075 .0123035
q2 -.0202872 .0025602 -7.92 0.000 -.025306 -.0152683
q3 .0010785 .0001952 5.53 0.000 .0006959 .0014612
d1 -.0229482 .0042381 -5.41 0.000 -.031256 -.0146403
qd1 .0007392 .0014278 0.52 0.605 -.0020597 .0035381
_cat#c.c1
0 .0552454 .0053343 10.36 0.000 .0447885 .0657022
1 .0862498 .0052022 16.58 0.000 .076052 .0964476
_cons .0628165 .0016957 37.05 0.000 .0594925 .0661405
sigma_u .03980548
sigma_e .04922656
rho .39535508 (fraction of variance due to u_i)
F test that all u_i=0: F(564, 7338) = 6.90 Prob > F = 0.0000