A Fuzzy Logic Approach to Modelling the Underground Economy
The availability of data for the size of the "Underground Economy" is important for macroeconomic policy. We use fuzzy set theory and fuzzy logic to construct an annual time-series for the (unobservable) New Zealand underground economy over the period 1968 to 1994. Two input variables are used - the effective tax rate and an index of the degree of regulation. The resulting underground economy time-series is compared with one previously constructed by the second author using a structural "Multiple Indicators, Multiple Causes" (MIMIC) model. The two approaches each yield sensible, but somewhat different, pictures of the New Zealand underground economy over this period. The fuzzy logic approach to this measurement problem involves several subjective judgements, but our results are quite robust to these choices.
|Date of creation:||23 Jul 1999|
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- David E. A. Giles, 1999.
"Modelling the hidden economy and the tax-gap in New Zealand,"
Springer, vol. 24(4), pages 621-640.
- David E. A. Giles, 1998. "Modelling the Hidden Economy and the Tax-Gap in New Zealand," Econometrics Working Papers 9810, Department of Economics, University of Victoria.
- David E. A. Giles, 1999. "Modelling the Hidden Economy and the Tax-Gap in New Zealand," Econometrics Working Papers 9905, Department of Economics, University of Victoria.
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- David Giles & Patrick Caragata, 2001. "The learning path of the hidden economy: the tax burden and tax evasion in New Zealand," Applied Economics, Taylor & Francis Journals, vol. 33(14), pages 1857-1867.
- David E. A. Giles, & Patrick J. Caragata, 1999. "The Learning Path of the Hidden Economy: The Tax Burden and Tax Evasion in New Zealand," Econometrics Working Papers 9904, Department of Economics, University of Victoria.