Money, like Janus, has two faces: past and future at the same time it represents (as we said ) what was and also all that be.
In a different dimension, money includes a second duality important: money balances, which is calculated as an asset to the private sector, they represent a liability to the Central Bank.
From political arithmetic and undesirable interactions
By definition, the issue of money by the Central Bank has as its counterpart increasing or decreasing asset net worth of the entity. It is clear, moreover, that different ways of altering the composition of the balance may pursue different objectives: for example, the purchase of foreign assets through issuance of money alter the foreign exchange market. But we are not interested in this case the reasons why the central bank can print money, but simply to draw attention that you have the power to do: we repeat, is the sole agent of the economy that counts for this purpose as part liabilities.
But the Central Bank is primarily a public sector body "monetary issue can then be completely independent of the decisions of revenues, expenditures and financing of public policy?
The same questions were Thomas Sargent and Neil Wallace (1981) . The point is relatively simple: when consolidating the budget constraint of the Central Bank with the public sector (ie, it takes both players as if they were one) shows that the only way to finance expenditures that exceed their income is through the issuance of any liability. This would be completely trivial, since by definition all excess spending must be matched by an increase or decrease the obligations of assets, if it were not for this new agent, to include the Central Bank has the possibility of financing through printing money.
By this logic, the authors found that in a context where the public sector has a financial deficit and there are limits to its indebtedness, is inconsistent jointly announce a restrictive monetary policy coupled with an expansionary fiscal policy (in the sense of maintaining a level of spending in excess of income). In the long term, when the public sector can not borrow, monetary policy is dominated by the financing needs of the treasury, taxation policy is determined by the possibilities of expansion of monetary policy.
Is this a general theory about the nature of inflation? Certainly not. First Instead, the mechanism that establishes a causal link from financial deficit to the price increase is certainly questionable. In an inflationary dynamics is reasonable that both variables interact, for example, through wage indexation (of what it would be almost impossible to distinguish which one "moves first"). Moreover, the real variables need not remain unchanged to an increase in the rate of inflation: a simple example, under certain assumptions the increase in demand could alter potential output and solve financial problems Public sector (scenario particularly emphasized in recent times and which we shall return later).
Now, although the work of Sargent and Wallace's criticism, the general proposition, that is born as a result of budget constraints, still stands: in a period of time, which can not be financed through an expansion of borrowing (or a decrease of public sector assets) will be covered by printing money. O, which is identical, a scenario of strong financing needs, monetary policy becomes necessarily passive.
From tactical to practical
The previous proposition has two advantages: not only is relatively simple, but at the same time is a useful tool for approaching two decades full of macroeconomic history Argentina. see then that tells us the "master of life. " A very broad strokes, during the '80 fiscal policy clearly signaled the pace of monetary policy, which for most of the decade was passive to the needs of public sector financing (an excellent job of that with the countless details I'm ignoring it Damill and Frenkel (1990) ).
During the '90s forced the independence of monetary and fiscal policy, but with the emergence of this deficit was only possible through access to capital markets or asset sales. In other words, given the impossibility (legal) to resort to printing money, the Treasury must necessarily go to the credit markets to cover its debt. A very mild this proxy statement in the chart below.
The story, by the time the leave in 2001, where policy rules certainly become more complex ( formation may occur together with the inflation tax surplus).
This means that between a state of nature and there is another change, a transformation that makes the economy becomes more prone to respond quickly to the monetary issue. This leads us to wonder about what may be the circumstances.
In the next post will try to negotiate the maze thick economists call expectations. Although, as Erik Lönnrot and Red Scharlach, we run the risk of ending up confusing Janus with Hermes.