For international migrants seeking employment in the United States, the desire to remit a portion of their earnings to their home countries is a time-honored custom. The flow of money southward from the United States has evolved from a stream flowing from families through informal networks to a major river with new tributaries fed by transnational migrant organizations, channeled through an increasingly formal marketplace, and attracting the involvement of home country governments. This volume tracks the evolution of the flow of money 'home,' offering new data to enhance the picture and understanding of this important economic phenomenon.