<Tr> <Td> Master's degree or higher </Td> <Td> $60,000 </Td> </Tr> <Tr> <Td> Bachelor's degree </Td> <Td> $45,000 </Td> </Tr> <Tr> <Td> High School Diploma (or equivalent) </Td> <Td> $30,000 </Td> </Tr> <Tr> <Td> No High School Diploma (or equivalent) </Td> <Td> $21,000 </Td> </Tr>

How do we measure social mobility in the united states