  The interdependent nature of the global economy has become stronger with
increases in international trade and investment. We propose a new model to
reconstruct the international trade network and associated cost network by
maximizing entropy based on local information about inward and outward trade.
We show that the trade network can be successfully reconstructed using the
proposed model. In addition to this reconstruction, we simulated structural
changes in the international trade network caused by changing trade tariffs in
the context of the government's trade policy. The simulation for the FOOD
category shows that import of FOOD from the U.S. to Japan increase drastically
by halving the import cost. Meanwhile, the simulation for the MACHINERY
category shows that exports from Japan to the U.S. decrease drastically by
doubling the export cost, while exports to the EU increased.
