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We compare the impacts of uncertainties in both binary population synthesismodels and the cosmic star formation history on the predicted rates ofGravitational Wave compact binary merger (GW) events. These uncertainties causethe predicted rates of GW events to vary by up to an order of magnitude.Varying the volume-averaged star formation rate density history of the Universecauses the weakest change to our predictions, while varying the metallicityevolution has the strongest effect. Double neutron-star merger rates are moresensitive to assumed neutron-star kick velocity than the cosmic star formationhistory. Varying certain parameters affects merger rates in different waysdepending on the mass of the merging compact objects; thus some of thedegeneracy may be broken by looking at all the event rates rather thanrestricting ourselves to one class of mergers.

Dependence of Gravitational Wave Transient Rates on Cosmic Star Formation and Metallicity Evolution History