The principal purpose of this study is to investigate the association between the efficiency of value added (VA) by the major components of a firm's resource base (physical capital, human capital and structural capital) and three traditional dimensions of corporate performance: profitability, productivity, and market valuation. Data are drawn from a sample of 75 publicly traded firms from South Africa from business sectors heavily reliant on intellectual capital. Empirical analysis is conducted using correlation and linear multiple regression analysis. Findings from the empirical analysis indicate that associations between the efficiency of VA by a firm's major resource bases and profitability, productivity and market valuation are generally limited and mixed. Overall, the empirical findings suggest that physical capital remains the most significant underlying resource of corporate performance in South Africa despite efforts to increase the nation's intellectual capital base.

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Breaks with the prior literature on intellectual capital disclosure practices in two major ways. First, provides a longitudinal examination of intellectual capital disclosure practices in the annual reports of 31 FTSE 100 listed companies from 1996-2000. Second, investigates the relationship between intellectual capital performance and the extent of intellectual capital disclosure. Between 1996 and 2000 the quantity of intellectual capital disclosure increased. Empirical findings did not indicate a systematic relationship between intellectual capital performance and the quantity of disclosure during the survey period. Results, however, suggest that if intellectual capital performance is too high the amount of disclosure is reduced. This negative association may support the suggestion that firms reduce intellectual capital disclosures when performance reaches a threshold level for fear of competitive advantage being lost. Leverage, industry exposure and listing status was also found to have an influence on the quantity of disclosure.