The author addresses this point, and how it is possible, but why so many grandfathers choose to remarry so quickly is still mysterious.
> As more people go to college, their families find that, for safety reasons, it is wise to increase the number of grandmothers per family. Since there is currently no biological way of doing so (though another grant proposal in preparation will ask for funds to look into the prospect of cloning grandmothers, using modern genetic engineering techniques), the families must resort to in creasing the pool by divorce and remarriage.
Although it seems to be stored on Dongwon Lee user dir, he states this document was written by "Mike Adams". I couldn't find this Mike Adams and I find it a little disturbing to read a Study that has no references, no date and the Author doesn't bother about writing his own name in it.
> As more people go to college, their families find that, for safety reasons, it is wise to increase the number of grandmothers per family. Since there is currently no biological way of doing so (though another grant proposal in preparation will ask for funds to look into the prospect of cloning grandmothers, using modern genetic engineering techniques), the families must resort to in creasing the pool by divorce and remarriage.