The purpose of this experiment was to use a retrospective case-control study to assess the success of replacement events when her productivity was greater or less than the mean for removal events attributed to problems with fertility, fecundity, or old age. A financial model sensitivity analysis was conducted and indicated a greater likelihood of economic advantage for a scenario without production-based removals in parities 1 to 6.

For more information the full article can be found at http://jas.fass.org/