哈哈,楼主本身就是行家,
仅提出个人看法.
你提出的问题应该可以用
Bruce E. Hansena & Byeongseon Seob (2002)
Testing for two-regime threshold cointegration in vector error-correction models.pdf
提出的方法来测试,这篇文献就是测试
the presence of a threshold effect (the null of linearity)
Under the null hypothesis,there is no threshold,
so the model reduces to a conventional linear VECM.
这就是package "tsDyn" TVECM.HStest()
Tests the null of linear cointegration against threshold cointegration following
Hansen and Seo(2002). Fixed regressor anfd residual bootstrap are available
This test follows the implementation done by Hansen and Seo (2002).
The cointegrating value is estimated from the linear VECM.
Then, conditional on this value, the LM test is run for a range of
different threshold values. The maximum of those LM test values is reported.
Two bootstrap are available: a fixed regressor,
as well as a usual residual bootstrap (using the function TVECM.sim).
#####
data(zeroyld)
dataPaper<-zeroyld
# Test: nboot, number of bootstrap replications, should be high
test1<-TVECM.HStest(dataPaper, lag=1, intercept=TRUE, nboot=1000)
summary(test1)
## Test of linear versus threshold cointegration of Hansen and Seo (2002) ##
Test Statistic: 20.59942 (Maximized for threshold value: -0.04805437 )
P-Value: 0.048 ( Fixed regressor bootstrap )
Critical values:
0.90% 0.95% 0.99%
18.84769 20.52291 23.16594
Number of bootstrap replications: 1000
#######
只是SETAR的gobal stationary的序列,不好找(中间的regime是单根)
大都有"政策"干预造成
譬如外汇,在中间外汇目标区,ZF采浮动
但超出范围,ZF就会大力干涉.


雷达卡


京公网安备 11010802022788号







