ARCHLM: Stata module to calculate LM test for ARCH effects
archlm computes Engle's LM test for ARCH (autoregressive conditional heteroskedasticity) effects in a regression residual series for a specified number of lags p. A list of lag orders may be given; if none are given, one lag is presumed. For each specified order, the squared residual series is regressed on p of its own lags. The test statistic, a T R^2 measure, is distributed Chi-squared(p) under the null hypothesis of no ARCH effects. See STB-54 for details. The test is built in to Stata 7 as "archlm"; also see "archlm2" which will work on a single timeseries of a panel.
|Requires:||Stata version 6.0|
|Date of creation:||24 Aug 1999|
|Date of revision:|
|Note:||This module may be installed from within Stata by typing "ssc install archlm". Windows users should not attempt to download these files with a web browser.|
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|Order Information:||Web: http://repec.org/docs/ssc.php|
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