Which of the following illustrates the costs associated with regional economic integration?

Americans suffer job losses when technology support work is outsourced to cheaper locations to countries like India.

Due to the establishment of NAFTA, Canadian workers in the textile industry lost their jobs as Canadian firms moved production to Mexico.

The euro is now used by $16$ of the $27$ member states of the European Union, with some countries opting to retain their national currencies.

The Andean Pact was largely based on the EU model, but was far less successful at achieving its stated goals.