ARCH

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ARCH

Autoregressive Conditional Heteroskedasticity

A statistical measure of the average error between a best fit line and actual data that uses past data to predict future performance. General Autoaggressive Conditional Heteroskedasticity is the most common way of doing this. See also: Fractal Distribution.
References in periodicals archive ?
While for some tastes Smithyman's verse tends at times towards archness and is always inclined to be prolix, there is no denying his sustained inventiveness, his openness, and ilo gainsaying the positive influence he has had, both as a teacher and as a practising writer, on many younger poets.
I think the archness and the utter gentility of refinement of it all, it's just for giggling ladies on the Upper East Side or something; it's salon art.
And the music, so deftly delivered, unfortunately draws attention to the archness of the composer --prim counterpoint contradicting the vernacular of Eric Crozier's chatty libretto, smart-alec references to Verdi, Wagner, even Britten himself - though the Purcellian ground-bass to "In the midst of life is death" is one of Britten's greatest achievements.
Darcy thus shows himself capable of revising his first impressions of Elizabeth and of seeing beneath surface attractions to inner character, even if he misreads the "mixture of sweetness and archness in her manner" that prevents her rudeness from offending him (56-57).
A talented bunch of musicians but there appears no passion in what they do, just a kind of empty archness.
Jokes that would go over wonderfully in front of a live audience, delivered with that trademark Colbert archness, fall as flat as last night's Pabst on the page.
They all play their roles seriously without a trace of archness.
Yes, she's got plenty of archness and a lifetime's worth of targets toward which she can sling it.
So the gay aesthetic comes to mean, yes, the mocking archness of camp and the searing irony of self-awareness, but even more than these, a kind of urgency and heat that says we refuse to be destroyed.
Her down-to-earthiness is a world away from the archness of Bassey.
It has backless dresses in the afternoon, adultery all over the shop and camp archness in every piece of worthless dialogue.
But a little over two months later, when she was once again appearing in the city, his diary entry for 10 February 1860 notes: "Little Patti made a most brilliant Rosina and sang a couple of English songs in the Music Lesson Scene, one of them ('Comin' thro' the rye') simply and with much archness of expression" (p.