How does the introduction of adjustment cost and imperfect competition alter the modelling of investment? “Even now that most monetary policy is conducted by independent monetary authorities, there is...

How does the introduction of adjustment cost and imperfect competition alter the modelling of investment?

“Even now that most monetary policy is conducted by independent monetary authorities, there is still the problem that politicians may pursue fiscal policies that are incompatible with stable inflation”. Briefly discuss this assertion with respect to Ghana.