Complex sentence: RBC theory is associated with freshwater economics (the Chicago school of economics, in the neoclassical tradition), and is rejected and harshly criticized by other schools within mainstream economics, notably Keynesians.
Split into simpler sentences: RBC theory is associated with freshwater economics (the Chicago school of economics in the neoclassical tradition). It is rejected and harshly criticized by other schools within mainstream economics, notably Keynesians.