<prompt> The purpose of investment setting expansion is to compensate forCasting ShrinkageCasting expansionWax eliminationAlloy melting  <response>: The rationale for increasing setting expansion is that certain newer alloys, such as base metal, have a greater casting shrinkage than do the traditional noble metal alloys. Thus, higher expansion is required in the stone die to aid in compensating for the alloy solidification shrinkage.Phillips 12th edition page no 191 