The impact of boardroom internationalisation on online disclosures of S&P 500

Purpose The purpose of this study is to analyse the level of online disclosure of firms in the USA and to evaluate the impact of diversity in terms of director nationality (boardroom internationalisation) on online disclosure. Design/methodology/approach The authors apply, for the first time, a new modified scoring system to measure online disclosure levels by securing more detailed information on each of the items in the voluntary disclosure index. Regarding the percentage of foreign board members, unlike in previous research, the authors calculate two additional proxies to more accurately specify the level of international diversity on the board: the Blau Index and the Shannon Index. Moreover, the authors use a cross-sectional model for the sampled non-financial S consequently, disclosure practices can be influenced. Therefore, these firms were excluded from the sample of the study. Originality/value This research contributes to the body of literature on nationality diversity of firm boards and corporate online disclosure in several respects. Firstly, the study adds an international dimension to the existing literature. Secondly, this study provides new evidence that foreign diversity on the board can improve firm value, insofar as the corresponding enhancement of online disclosure leading to positive capital market implications. Thirdly, the authors use, for the first time, a new scoring system approach to measure the level of online disclosure. Finally, it contributes to the corporate governance literature by basing its analysis on a multi-theoretical approach.