Hi,
I am confused between what is modern economics? And mainstream economics? Are they the same?

Mainstream economics are issues that have been in place since the 50s. Modern economics are technological advanced to fit in with our current lifestyles.

Mainstream = buying durable goods, cash or check. Modern=New electronic gizmos with credit. Online sales too, EBay, Craigslist. Things your parents never heard about or even imagined.