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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 ?
Much of the nudity I see today is not archly beautiful or sculptural or didactic as it was years back.
Firstly, on the Light Entertainers series we had the so-called alternatives archly displaying their political credentials.
Expectedly, fog swirls, Scotland Yard bumbles, and suspects act archly.
As Purdue noted archly in its press release about the court decision, "Purdue never made the claim in the patent application that it had done experiments to establish this property and the patent examiner never asked for such information.
And its style is archly Wildean, to wit: "'What means this ghastly pomp and circumstance?
I sometimes think that the Devil lives in Islington and reads The Tablet," she said of the archly progressive Catholic magazine shortly before her death.
In Dorfman's story, the exile's return is couched in the archly symbolic comparison of Santiago's sinful "Cerro de Santa Lucia" and an iceberg, whose invisible bulk reverberates in various other stories--in Donoso's spicily imagined, insider view of Matilde Neruda's funeral; and the other side of summit, so to speak, in Edwards's story of the plebiscite that ended the visible part of Pinochet's dictatorship, "My Name Is Ingrid Larsen.
Eighteenth-century gallants were already rogering, archly defined by Boswell's Yale editor Frederick Pottle as "a word of other meaning than that acquired since the introduction of radio-telephony," screwing (not in the original OED), and shagging, now spoiled by Austin Powers' association and muddied by its curious gamut of meanings from "carpet" to "school dance" to "strong tobacco," plus in old English public school argot it meant "masturbate," a social as well as sexual divide; according to Atyo, Melvyn Bragg (ubiquitous British TV cultural pundit--watch for his new book, English: Biography of a Language) now stands for shag--surely some cognate scope here for the likes of Alan Funt.
At the same time, it also initiated the mid-priced Archly Blue series, which focused specifically on older recordings from its early music imprint.
This is the first collection of Hugues de Berzes lyrics since Karl Engelcke's (essentially diplomatic) edition ('Die Lieder des Hugues de Bregi', Archly fur das Studium der neueren Sprachen und Literaturen, 75 (1886), 147-76).
In the 'architecture' entry there was this: 'the jargon of architecture is what architects and designers archly call "talkitecture" or "archispeak".
Surrounding his voice, the band brandishes an arsenal of instruments--rushing, exact, pounding, and archly powerful.