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I found the old article very ambiguous. It was not clear on the definition of international economics. The new article provides a clear and imho comprehensive definiton.
I would suggest to keep this article short, and I would not consider it a stub. International economics is rather studied separatly in it's two subdisciplines. People searching for more detail information should consult the topics of international trade and international finance.
Beware of the confusion with international economy, those are two related but different topics.