The Limiting Distribution of the Autocorrelation Coefficient under a Unit Root
The Limiting Distribution of the Autocorrelation Coefficient under a Unit Root
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单位根下自相关系数的极限分布
DOI:
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发表时间:
1993
期刊:
影响因子:
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通讯作者:
K. Abadir
中科院分区:
文献类型:
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作者:
K. Abadir
The limiting distribution of the normalized autocorrelation coefficient in the case of a unit root is given in a closed form. It is found that high order transcendental functions such as the parabolic cylinder functions are indispensable to express this distribution, thus departing from the simple standard normal distribution that arises in the case of a stable root. Using the formulae derived in this paper, some numerical results available from previous studies are then extended and refined. Finally, the formulae are manipulated analytically to explain the unusual shape of the distribution.