门槛模型
xtptm y x1 x2, rx(x3) thrvar(x4)
xtptm程序包中,对x3的解释为:regime dependent variables
对x4的解释为:threshold variable
请问,x3代表什么变量?x4是指被用来求门槛值的变量么?x1、x2是指回归方程中除x3、x4外的所有解释变量?
xtptm varlist , rx(varlist) thrvar(varname) [ trim(real 0.05) ///
iters(integer 0) grid(integer 0) regime(integer 1) ]
where:
rx: regime dependent variables
thrvar: threshold variable
trim: trimmed proportion for search of threshold
iters: iterations for bootstrapping to compute p-value
grid: number of grids for search of threshold
regime: number of threshold, default is 1


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