Draeseke, Robert; Giles, David E.A. - In: Mathematics and Computers in Simulation (MATCOM) 59 (2002) 1, pp. 115-123
The availability of data for the size of the “underground economy” (UE) is important for macroeconomic policy. We use fuzzy set theory and fuzzy logic to construct an annual time-series for the (unobservable) New Zealand UE over the period 1968–1994. Two input variables are used—the...