Definitions
from Wiktionary, Creative Commons Attribution/ShareAlike License
 n. The crosscorrelation of a signal with itself: the correlation between values of a signal in successive time periods.
Etymologies
Examples

This would fatten the tails of the return distribution and introduce long term autocorrelation to the return series.
"Options theory is kind of deep in some way. It was very elegant; it had the quality of physics."

I use the method of Quenouille, which adjusts the effective N by an amount incorporating both the short and long term autocorrelation:

I used a variety of methods to generate it, from making noise that is slightly pink mostly white noise with a bit of lag 1 correlation to noise that had a longterm autocorrelation structure that was similar to the “Union” reconstruction, mixed with just a bit of white noise.

The real data series presumably show longer term autocorrelation ?

Stock values usually have very strong shortterm autocorrelation, and we can say that tomorrow's value is todays value plus some error.

So we published an article focusing on the statistical anomalies associated with 9/11 in the journal Foundation of Physics Letters.32 One of those anomalies was that the GCP random data showed an extremely unlikely and persistent temporal structure called an autocorrelation, with odds against chance of a million to 1.

Is the issue of run order, the same as the idea of autocorrelation?

Using a mathematical formula called autocorrelation

Using a mathematical formula called autocorrelation,

Andy Hildebrand, a geophysicist who worked with Exxon, came up with a technique called autocorrelation to interpret these waves.
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