There is no simple answer to the question of whether or not it is in the interests of breeders in the United States to limit the number of mares any stallion can cover. However, we can be certain that none of the relevant arguments should be concerned with questions of free markets. Not even the most dogmatic of believers in the efficiency of free markets would, after a moment's reflection, consider the market for stallion seasons to have the appropriate characteristics. A free market is one in which no one...