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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 ?
As the fetal head flexes to pass under the pubic arch, the anterior pelvis comes under increasing pressure.
14] The axillary mass prevented adduction of the anterior (right) shoulder, however, thus impeding passage of the anterior shoulder under the pubic arch.
The pubic arch is also narrower, therefore causing the forces of labor to be directed backward, rather than toward the anterior segment, which might explain the low incidence of POP in African American women, said Dr.