Autocorrelation#

Functions for autocorrelation diagnostics and tests.

`sigmaquant.research.autocorr.acf`	Compute sample autocorrelation function.
`sigmaquant.research.autocorr.bartlett`	Bartlett test for autocorrelation at a specific lag.
`sigmaquant.research.autocorr.ljung_box`	Ljung-Box (or Box-Pierce) test for autocorrelation.
`sigmaquant.research.autocorr.AutocorrelationTest`	Container for autocorrelation diagnostic test results.