Comparing Standard and Robust Serial Correlation Tests in the Presence of Garch Errors

Recently, Diebold (1986) and Wooldridge (1991) have suggested procedures for ensuring that well known tests for serial independence have asymptotically reliable sizes in the presence of conditional heteroscedasticity. This paper uses a Monte Carlo experiment to compare the sizes and powers of several versions of these robust tests with their "non-robust" forms and with standard exact tests. The general conclusion is that both robust procedures lack power and are dominated by well specified exact tests. This conclusion is not altered when the assumption of normally distributed innovations is relaxed.


Issue Date:
Jun 01 1993
Publication Type:
Working or Discussion Paper
Language:
English
Total Pages:
30
Series Statement:
9308




 Record created 2017-09-28, last modified 2017-09-28

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