This article examines the relationship between board structure and the intellectual capital performance of South African publicly listed companies. Board composition was analysed in terms of gender and ethnic diversity, using cross‐sectional multiple regressions. The population of the study included all South African companies listed on the JSE Securities Exchange during 2003. The final sample, after the transformation of the data, consisted of 117 companies. The empirical results indicated a positive significant relationship between the percentage of ethnic members on the companies’ boards of directors and intellectual capital performance. Based on the results of this study, it is argued that South African publicly listed companies may be able to enhance their intellectual capital performance by using an ethnically diverse board of directors.

The debate on the determinants of firm value is ongoing; and the increasing gap in the book‐to‐market ratio (Lev & Sougiannis 1999) has yet to be explained in the financial literature. This article contributes to the debate by examining whether intellectual capital measured using the value added intellectual coefficient (VAICTM) (Pulic 1998) contributes to the explanation of the book‐to‐market ratio. This study used Ohlson’s 1995 valuation model and JSE Securities Exchange (SA) (JSE) data in an attempt to identify whether the book value of assets, accounting (accrual) earnings and VAICTM explain the behaviour of South African share prices. The panel data least squares model results indicate a significant relationship between share prices three months after year end, and abnormal earnings, abnormal cash dividends, book value of assets, the capital employed coefficient, and the human capital coefficient.