how and in what ways does the historical timing of a group's entry (e.g. Irish, Jews, Italians, Afro-Caribbeans) into the United States affect its economic and social mobility? How does one group come to monopolize one trade or occupation? How are race, ethnicity, and control of local politics linked to upward mobility?

how and in what ways does the historical timing of a group's entry (e.g. Irish, Jews, Italians, Afro-Caribbeans) into the United States affect its economic and social mobility? How does one group come to monopolize one trade or occupation? How are race, ethnicity, and control of local politics linked to upward mobility?