Using a two-factor (labor and capital), two-good (shift-working and non shiftworking commodities) model with two countries (Home and Foreign) which are located in different time zones, we highlight the impact of trade in labor services (via communication networks) on the comparative advantage of...

Teaching trade patterns and trade gains under the Ricardian trade model is one of the most difficult tasks for teachers of international economics. We propose that the utilization of both the PPF and a labor market graph makes the understanding of Ricardian trade gains much easier