Competition and ownership structure: Substitutes complements? Evidence from the Warsaw Stock Exchange

In this paper we analyse the impact of product market competition and ownership structure on firm performance. Our results show that product market competition has a positive and significant impact on performance. Concerning the effect of ownership concentration, we find a U-shaped relationship with performance. Firms with relatively dispersed and relatively concentrated ownership have higher productivity growth than firms with an intermediate level of ownership concentration. This correlation between concentration of ownership and productivity growth is not explained by the type of the controlling shareholder. Finally, product market competition and good governance tend to reinforce each other rather than to be substitutes. Competition has no significant effect on performance for the firms with 'poor' governance; on the contrary, it has a significant positive effect in the case of firms with 'good' corporate governance.