In the United States, apprenticeship operates as a federal-state partnership with both the central (federal) and state governments playing leading and complementary roles in operating and growing the apprenticeship system. This arrangement provides states with the opportunity to learn from each other’s experiences in what U.S. Supreme Court Justice Louis Brandeis called the “laboratory of democracy.” This chapter reviews apprenticeship policy transfers across states in the United States, the development of national occupational standards, and the role of research and evaluation in policy transfer.