The exponential growth of international travel since the 1960s has left border management systems worldwide struggling to keep up and has exposed weaknesses in states’ abilities to effectively manage their borders, especially regarding terrorist attacks, human trafficking, and illegal migration.

Over the past half century, migration from Mexico and Central America to the United States has been driven in part by regional demographic and human-capital trends. As the U.S. labor force became better educated, fewer native workers accepted certain low-skilled jobs. This report offers a look at the economic changes that have coincided with a Mexican and Central American population boom.

Noncoercive, pay-to-go, voluntary, assisted voluntary, and nonforced returns generally can offer paid travel and/or other financial incentive to encourage unauthorized immigrants to cooperate with immigration officials and leave host countries. A look at three key rationales for governments to choose pay-to-go and other returns.