
By Jacob Assa and Marc Morgan
“The purpose of studying economics is not to acquire a set of ready-made answers to economic questions, but to learn how to avoid being deceived by economists.”
― Joan Robinson
Recent years have seen a proliferation of debates on the shrinking of fiscal space in both industrialized and developing countries. In the former, the discussion often takes the form of agonizing over fiscal ‘black holes’, whereas in the latter it is usually presented in the context of ‘unaffordable debt’.
In reality, the real black holes, or blind spots, are those found in neoclassical economic models underlying such debates, rather than in the real economy (Table 1). We describe three such neoclassical fiscal black holes, based on our recent paper ‘The General Relativity of Fiscal Space’.
Table 1. Overview of fiscal black holes in the neoclassical paradigm.

Source: Authors’ elaboration. Shaded in black are the black holes of the neoclassical fiscal paradigm.
We show how fiscal space is not the absolute sum of taxes and borrowing, but rather relative in several ways. It depends on macroeconomic conditions, such as unemployment and inflation, countries’ degree of monetary sovereignty, and their level of productive capacity. Furthermore, fiscal space is relative to what governments do with it, expanding or contracting depending on the function of public spending.
Read More »





