Monetary theory and policy are part of intertemporal public finance. This Paper reviews some interesting recent developments. The two ghosts are the venerable liquidity trap and the Pigou effect or real balance effect. The eccentricities are negative nominal interest rates and the helicopter...

The paper first reviews the budget identities of the fiscal and monetary authorities and the solvency constraint or present value budget constraint of the consolidated public sector, for both closed and open economies. It then discusses the new conventional wisdom concerning the fiscal roots of...