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Human capital is increasingly believed to play an important role in the growth process; however, adequately measuring its stock remains controversial. Because the estimated impact that human capital has on economic growth is sensitive to the measures or proxies of human capital, accurate and consistent measures are needed. While many measures of human capital have been developed, most rely on some proxy of educational experience and are thus plagued with limitations. In this study, we modify the lifetime labour income approach outlined by Jorgenson and Fraumeni (The Measurement of Savings, Investment and Wealth, Chicago, IL, University of Chicago Press, 1989, pp. 227–282; Output Measurement in the Services Sector, Chicago, IL, University of Chicago Press, 1992, pp. 303–338) to estimate the monetary value of the human capital stock for New Zealand. Based on data from the New Zealand Census of Population, we find that the country's working human capital grew by half between 1981 and 2001, mostly due to the rise in employment level. This stock of human capital was also well over double that of physical capital in all the census years studied.