A Preliminary Analysis of the Dynamics of Individual Market and Disposable Incomes
This paper reports early results from an ongoing analysis of the income dynamics of individuals, using the Inland Revenue Department’s income tax database over the four- year period 1994-7. The first two parts of the paper assess the reliability of the data. The third part reports a preliminary analysis of the dynamic properties of individual incomes. Two types of analysis are used – an analysis of transitions between quintiles of market income over time – and an analysis of the covariance of individuals market and disposable incomes through time. The author finds that there is a high degree of consistency in the data, although inconsistencies point to the need for care in the handling of outliers. The analysis of dynamics suggests that, for this sample, a large fraction of the observed differences in incomes is transitory. For example, less than 50% of the differences in incomes persist after 3 years. However, if outliers are excluded, the degree of observed persistence rises quite strongly: about two-thirds of market income differences and about 60% of disposable income differences persist after three years in this sample. The latter result is in line with results typically found in US and other overseas analyses using panel data from household surveys. Further analysis, incorporating another year of data and additional modelling techniques, is underway.
|Date of creation:||2000|
|Date of revision:|
|Contact details of provider:|| Postal: |
Phone: +64-4-472 2733
Fax: +64-4-473 0982
Web page: http://www.treasury.govt.nz
More information through EDIRC
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
- Lee, Lung-Fei, 1983. "Generalized Econometric Models with Selectivity," Econometrica, Econometric Society, vol. 51(2), pages 507-12, March.
- Orley Ashenfelter & David Card, 1984.
"Using the Longitudinal Structure of Earnings to Estimate the Effect of Training Programs,"
NBER Working Papers
1489, National Bureau of Economic Research, Inc.
- Ashenfelter, Orley & Card, David, 1985. "Using the Longitudinal Structure of Earnings to Estimate the Effect of Training Programs," The Review of Economics and Statistics, MIT Press, vol. 67(4), pages 648-60, November.
- Orley Ashenfelter & David Card, 1984. "Using the Longitudinal Structure of Earnings to Estimate the Effect of Training Programs," Working Papers 554, Princeton University, Department of Economics, Industrial Relations Section..
- Lee, Lung-Fei, 1982. "Some Approaches to the Correction of Selectivity Bias," Review of Economic Studies, Wiley Blackwell, vol. 49(3), pages 355-72, July.
When requesting a correction, please mention this item's handle: RePEc:nzt:nztwps:00/15. See general information about how to correct material in RePEc.
For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (Web and Publishing Team, The Treasury)
If references are entirely missing, you can add them using this form.