The assignment content discusses the Stopler Samuelson Theorem, an extension of the Heckscher-Ohlin model that explains how countries trade based on their factors of production. According to the theorem, a country will export goods it can produce with abundant resources and import those requiring scarce resources. Australia's increasing trade openness is found to be consistent with this theory, resulting in increased wages for skilled labor and decreased demand for unskilled labor. In contrast, USA's decreasing IPI as trade openness increases does not align with the Stopler Samuelson Theorem.