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A country has an advantage over another if the opportunity cost of production of a particular good is lower in that country than it is in others. In this context, countries can equally benefit from trading specialized goods.
This thesis explores the similarities and dissimilarities of perceived levels of marital conflict and happiness in cross-national and same-nation marriages and some related issues. Globally, economic and social ties between nations have increased dramatically since World War II. As a result, more and more individuals are working, studying and traveling abroad.