Empirical testing of comparative cost:

There have  been  several attempts  of  empirically  testing  the comparative cost and H-0  theorems. However,  testing  the basic Ricardian model would not be sound, since detailed predictions depend strongly on the most unrealistic assumptions, e.g. only two goods. Therefore, in the existing literature, most studies have focused on testing  the comparative advantage predictions within the H-0 framework. It is for  this  reason that the empirical critiques of  the H-0 theorem are presented here.