What factors could explain why some countries have a higher multiplier than others? What are the implications of the relationship between the money supply (M) and the V and Y terms in the quantity...

What factors could explain why some countries have a higher multiplier than others? What are the implications of the relationship between the money supply (M) and the V and Y terms in the quantity equation MV = PY for the effectiveness of controlling the amount of money in the economy as a means of controlling inflation?