4Macroeconomic benefits
4.1Implications for monetary policy
Turning to the role played by cash in monetary policy, this section focuses mainly on the more traditional arguments that are put forward in favour of cash.Section 7.2 explicitly examines the debate that has only recently taken centre stage concerning aspects of the effective implementation of negative interest rates.
Cash (meaning banknotes) is a key item on the liabilities side of a central bank’s balance sheet. Totalling more than € 1.1 trillion, banknotes accounted for around 40% of the Eurosystem’s consolidated balance sheet total at the end of 2016. It follows that, in a world without cash (and ceteris paribus), central bank balances sheets would become considerably shorter. This is especially true of the Eurosystem’s balance sheet and that of the Federal Reserve System, not least because substantial cash holdings of US dollar and euro are held abroad. Hence, central banks would hold fewer interest-bearing assets and their profits would be smaller than today.10 Central banks might then prove unable to generate sufficient earnings to cover their own costs, thus making them dependent on grants from their respective government. Given the current level of reserves, this scenario seems unlikely, but it should still be noted that prior to the various crisis periods, when banks had next to no excess reserves, the relative significance of cash was much greater. At all events, the level of profit distributions paid to governments would probably decline, potentially jeopardising central bank independence. Moreover, the modest size of the balance sheet could cause problems in cases where extensive restrictive (liquidity-absorbing) measures cannot be carried out.
In a world where cash payments were subject to restrictions and obstacles, market participants would take avoidance action. The demand for foreign currencies would increase and private (in)official means of payment such as bitcoins, vouchers, regional currencies (eg the “Chiemgauer”, used in Prien am Chiemsee in Bavaria), trade bills, cheques etc would flourish (again) and undergo a new wave of development. This would make it harder for the central bank to control the overall money stock (see ECB, 2015 b).
Monetary theory usually postulates that a central bank uses its control over the availability of central bank money (ie over banks’ liquidity or reserves) or its pivotal role in setting the short-term interest rate to indirectly influence price developments. In actual practice, a short-term interest rate is the preferred operational target (see Görgens et al, 2014, section III.4). This implies the use of a precisely specified range of monetary policy measures for achieving price stability, in turn entailing a precisely defined volume of central bank money and monetary aggregates (see Nelson, 2008, 1805). So long as legal tender issued exclusively by the central bank in the form of cash continues to exist, there will be an institution in place that – assuming credibility – cares about nominal variables such as the money stock and price developments, thus solving the indeterminacy problem with respect to the price level (see Costa Storti& de Grauwe, 2001).
But how would this process unfold in a cashless world? Let us start by assuming that money consists solely of deposits issued by banks, with no reserves being held at the central bank and the unit of account is set by the government with respect to the domestic currency (eg euro).11 Since the possibilities for money creation available to (profit-maximizing) banks would not be constrained by cash withdrawals or minimum reserves, the acquisition of assets (as counterparts to deposits, eg shares, bonds, lending) would also be unconstrained. Monetary developments as well as asset and price developments would therefore be indeterminate (see Costa Storti& de Grauwe, 2001, section 2).12 Introducing minimum reserve requirements, issuing electronic central bank money or strengthening the supervisory role of the central bank are all steps that could counterbalance this effect.
Under the prevailing system, there is a demand on the part of banks for reserves at the central bank as a way to obtain cash or due to voluntary or mandatory reserve holdings. A connection evolves between the commercial banking system and the central bank, inter alia through cash. This gives rise to a demand for central bank money, which, in turn, is needed for the operational management of the overnight rate. And cash accounts for the lion’s share of central bank money (monetary base). In terms of central banks’ liquidity management, this component represents an autonomous factor, normally following an upward trend with a seasonal weekly, monthly and annual pattern. These regularities make it possible to forecast the evolution of banknotes with relative ease when managing liquidity (with regard to the Eurosystem, see Camba-Mendez et al, 2009).
Schreft& Smith (2000) investigate the repercussions of a decline in the demand for cash for transaction purposes on the efficacy of different monetary policy strategies (inflation targeting, money targeting etc). They conclude that, in a world of positive interest rates, all strategies can, in principle, be implemented using conventional open market operations. This does not necessarily hold in an economy with z