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where K(t) is the measure of the real capital stock at time t, I(t) is the real rate of investment, and the rate of depreciation. By successive backward substitutions for K(t-l), K(t) can be expressed equivalently as a weighted sum of past levels of investment plus the depreciated value of an initial real capital stock: The initial real capital stock, K(O), that is implicitly a component of every measure of the capital stock calculated by this method can rarely be measured, however, with any degree of accuracy. As demonstrated in this paper, the measurement error can frequently lead to severe bias in the estimated coefficients of investment functions. This paper proposes a method to bypass this source of measurement error. In important cases it is then possible to estimate unbiased and consistent coefficients. PDF files: Adobe Acrobat Reader ZIP files: PKWARE Home | IFDPs | List of 1989 IFDPs Accessibility | Contact Us Last update: November 10, 2008 |