Why has Madoff been compared to a Ponzi Scheme?

Which would make the best heading for this list of notes about the migration of african-americans during the reconstruction era?

How did the war of 1812 contribute to an increase in u.s. manufacturing? a) the war provided more resources for factories to increase production. b) the war promoted trade between countries so that americans could focus on fighting. c) the war cut americans off from their previous supply of imported manufactured goods. d) the war limited transportation in america, making it necessary to import manufactured goods.

Only 1 vote per state regardless of size why is this a problem