How does a shift in either the saving or the investment curves move the economy to a new equilibrium? Explain. ‘Fisher’s quantity theory of money is a tautology and does not make any assertions about...

How does a shift in either the saving or the investment curves move the economy to a new equilibrium? Explain.

‘Fisher’s quantity theory of money is a tautology and does not make any assertions about the relationships between

the variables in the real world.’ Explain.