The impact of intellectual capital on firm performance is one of the key aspects of strategic management. This is particularly crucial for firms in the hightech or service sectors. Intellectual capital dimensions, including human, organisational and social capital, are key to developing outstanding performance. From a strategic management perspective, there are still debates on the interrelationships between these dimensions, and on the moderating role of environmental uncertainty on their impacts on performance. In the context of an unstable environment like Vietnam, this study involved a survey of 350 information communication technology (ICT) firm's directors and managers, which was used to analyse the impacts of intellectual capital dimensions on firm performance, the indirect effects of organisational capital on performance via human and social capital, and the moderating role of environmental uncertainty. Findings indicate that all dimensions of intellectual capital had direct impacts on firm performance. In addition, we found that the human and social capital mediated significantly the relationship between firm performance and organisational capital, and the environmental uncertainty moderated significantly the relationship between intellectual capital dimensions and firm performance.

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Primarily due to the importance of organizational commitment for both employees and employers, over the last few decades, the model of antecedents has continued to attract researchers. Hence, in this paper, the authors aim to build a model of antecedents to strengthen organizational commitment. In this study, the authors reviewed six main concepts and then applied the quantitative methods to research. The findings show that the three most prominent factors positively affecting organizational commitment are intrinsic motivation, extrinsic motivation, and organizational identification. This model will facilitate leaders to make plans of action to design suitable and efficient policies for motivating employees to increase their job performance and be more committed to their organization.