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Copyright © 2012, Campbell R. Harvey. All Rights Reserved.

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.
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References in periodicals archive ?
Use and need of prosthesis on the upper and/or lower arch, stratified by age group, by adults resident in Piracicaba, SP, Brazil, 2011.
One week after the extraction, alignment of the lower arch was initiated with a 0.014-in nickel--titanium wire, an open coil spring was placed between the lower right first molar and first premolar, alignment and space opening for the tilted lower right second premolar were performed at the same time (Figure 3a).
In the case of R = 0.7, as the upper abutment is weaker than the lower abutment, a larger proportion of structural loads is sustained by the lower part of dam compared to the case of R = 1.0, resulting in more cracks at the upstream ends of the lower arch rings and the upstream part of dam bottom at the same loading level.
In the lower arch, this finding was revealed in a similar number of girls (44.2%) and boys (43.0%).
The trend now is a much lower arch, a simple look which highlights groomed brows."
Damas' Ananya collection is popular for its Tanmania pieces offering uniquely designed pendant chains where the lower arch of the chain has been converted into a pendant design of bewitching essence.
Because the lower arch is more constrained, the limits of expansion for stability seem to be tighter for it than the maxillary arch.
The upper first molars and both bicuspids of the upper arch are developed more than those in the lower arch. When these upper six teeth are in Pont's Index, put distal extensions on the body wire both upper and lower if necessary--at the same time upper and lower cuspids can be put into position.
A self-ligating appliance (0.022x0.028-slot Roth prescription; In-Ovation R; Dentsply GAC International Inc., USA) was delivered to the upper and lower arch. Transpalatal bars were placed on the first and second molars for torque control, preventing the buccal inclination of the molars.
Six weeks after the extractions primary impressions of upper and lower arch were taken with alginate for fabrication of upper and lower complete denture.
Caption: Figure 2: Post-operative picture showing Groper's appliance given in the maxillary arch irt 51, 61 and removable space maintainer in the lower arch, functional irt 74 and nonfunctional irt 84, 85

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