Reweighting the New Zealand Household Economic Survey for Tax Microsimuilation Modelling
AbstractThis paper reports a reweighting exercise for the New Zealand Household Economic Survey, which is the basis of the Treasury's microsimulation model, TaxMod. Comparisons of benefit expenditures in a variety of demographic groups, along with population data, reveal that TaxMod estimates differ substantially from totals based on administrative data, when the weights provided by Statistics New Zealand are used. After describing the method used to compute new weights, the calibration requirements are reported. These relate to the age structure of the population and the number of beneficiaries for Unemployment Benefit, Domestic Purposes Benefit, Invalid's and Sickness Benefits and Family Support and Tax Credits. The revised weights and expenditure estimates are reported and the resulting distribution of income examined. The new weights are found to produce much improved expenditure estimates, without distorting the resulting income distribution. The effects of reweighting are demonstrated using a simple policy simulation.
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Bibliographic InfoPaper provided by New Zealand Treasury in its series Treasury Working Paper Series with number 03/33.
Date of creation: Dec 2003
Date of revision:
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Survey weights; minimum distance; microsimulation;
Find related papers by JEL classification:
- C42 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods: Special Topics - - - Survey Methods
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- John Creedy, 2003. "Survey Reweighting for Tax Microsimulation Modelling," Treasury Working Paper Series, New Zealand Treasury 03/17, New Zealand Treasury.
- John Creedy & Catherine Sleeman, 2004. "Adult Equivalence Scales, Inequality and Poverty in New Zealand," Treasury Working Paper Series, New Zealand Treasury 04/21, New Zealand Treasury.
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