阅读一
A comparative study of unit root tests with panel data and a new simple test --2
单位根检验与面板数据的比较研究和一种新的简单检验 –2
1, Suggest modifications of the PP test to increase power.
2, There are now more powerful tests available even in the single equation context. Suggest modifications of the PP test to increase power.
See, for example,:
1) Elliott, Rothenberg and Stock (1996)
2) and also Perron and Ng (1996) who
3, Present a review of the Levin±Lin tests
It a simple alternative tests
we shall present a review of the Levin±Lin tests, their extension by Im, Pesaran and Shin (1997), which will be referred to as the IPS test, due to Fisher (1932) which will be referred to as the Fisher test.
4, Then present some results from Monte Carlo experiments comparing these three tests and some evidence from the bootstrap which allows for correlation in the errors.
5, Finally, consider a test based on the Bonferroni inequality and conduct a Monte Carlo experiment to compare this test with the Fisher test.