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@@ -543,9 +543,7 @@ <h1>Source code for arch.unitroot._phillips_ouliaris</h1><div class="highlight">
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< span class ="sd "> and "quadratic-spectral" for the Quadratic Spectral kernel.</ span >
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< span class ="sd "> bandwidth : int, default None</ span >
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< span class ="sd "> The bandwidth to use. If not provided, the optimal bandwidth is</ span >
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- < span class ="sd "> estimated from the data. Setting the bandwidth to 0 and using</ span >
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- < span class ="sd "> "unadjusted" produces the classic OLS covariance estimator.</ span >
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- < span class ="sd "> Setting the bandwidth to 0 and using "robust" produces White's</ span >
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+ < span class ="sd "> estimated from the data. Setting the bandwidth to 0 produces White's</ span >
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< span class ="sd "> covariance estimator.</ span >
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< span class ="sd "> force_int : bool, default False</ span >
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< span class ="sd "> Whether the force the estimated optimal bandwidth to be an integer.</ span >
@@ -566,14 +564,6 @@ <h1>Source code for arch.unitroot._phillips_ouliaris</h1><div class="highlight">
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< span class ="sd "> Notes</ span >
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< span class ="sd "> -----</ span >
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-
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- < span class ="sd "> .. warning::</ span >
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-
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- < span class ="sd "> The critical value simulation is on-going and so the critical values</ span >
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- < span class ="sd "> may change slightly as more simulations are completed. These are still</ span >
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- < span class ="sd "> based on far more simulations (minimum 2,000,000) than were possible</ span >
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- < span class ="sd "> in 1990 (5000) that are reported in [1]_.</ span >
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-
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< span class ="sd "> Supports 4 distinct tests.</ span >
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< span class ="sd "> Define the cross-sectional regression</ span >
@@ -644,7 +634,7 @@ <h1>Source code for arch.unitroot._phillips_ouliaris</h1><div class="highlight">
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< span class ="sd "> differs from the expression in [1]_. We recenter :math:`z_t` by subtracting</ span >
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< span class ="sd "> the first observation, so that :math:`\tilde{z}_t = z_t - z_1`. This is</ span >
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< span class ="sd "> needed to ensure that the initial value does not affect the distribution</ span >
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- < span class ="sd "> under the null. When the trend is anything other than "n", this set is not</ span >
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+ < span class ="sd "> under the null. When the trend is anything other than "n", this step is not</ span >
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< span class ="sd "> needed and the test statistics is identical whether the first observation</ span >
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< span class ="sd "> is subtracted or not.</ span >
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@@ -931,7 +921,7 @@ <h1>Source code for arch.unitroot._phillips_ouliaris</h1><div class="highlight">
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Created using
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< a href ="https://www.sphinx-doc.org/ " target ="_blank " rel ="noopener "> Sphinx</ a >
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- 7.2.6 .
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+ 7.3.7 .
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and
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< a href ="https://github.com/jbms/sphinx-immaterial/ " target ="_blank " rel ="noopener "> Sphinx-Immaterial</ a >
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