The covariates include the control variables mentioned above (parity, season, education, and religion) plus the length of the previous birth interval.
Other possibilities exist which are combinations of these with varying weights (usually depending on parity progression ratios and not always having a clear interpretation).
While dramatically women in opera suffer every known form of sexist depredation, vocally they enjoy absolute parity with men.
The piglets were obtained from 14 litters of 1-5 parity sows.
The orthodox gold supporters attained a resumption of convertibility, but the voices for employment and against deflation attained a significant devaluation from the pre-war parity.
Another way of examining religious fertility differentials is by the distribution by parity.
While such arguments fall short of being logical demonstrations, they are nonetheless essential to his early parity argument for the rationality of theistic belief.
In ideal terms the new society was based on gender parity.
