Answer:
Feudal, communist and socialist economic system.
Explanation:
The economic system in Ethiopia during the imperial regime is feudal economy, the economic system in Ethiopia during the EPRDF regime is capitalist economy and the economic system in Ethiopia during the Derg regime has socialist economy. They follow and promoted a Marxist -Leninist system. So every regime has different economic system i.e. feudal, communist and socialist economic system.
