A methodology to measure the quality of tax avoidance case studies: Findings from the Netherlands

In recent years, there have been substantial efforts to combat corporate tax avoidance. These efforts have been propelled in part by mediatized case studies, conducted by non-governmental organizations (NGOs) and other groups, on the tax avoidance practices of multinational enterprises. These case studies have been criticized because they allegedly lack quality, but this criticism has not been assessed academically. This research seeks to address that gap. It proposes a new methodology to analyze the quality of these case studies systematically. We construct ten indicators related to alleged weaknesses and use these to assess 14 case studies involving Dutch corporate entities. We find that the quality of these case studies is affected negatively by a lack of adequate data. Thus, if companies and governments enhance transparency, this could increase the quality of case studies by NGOs and other groups. In addition to this, we find that the NGOs and other groups themselves can sometimes increase the quality of their case studies by investing in technical expertise and adopting practices that foster objectivity. The methodology developed for this study could also be of use for other topical debates, such as disclosure requirements and corporate social responsibility reporting. Whereas we were able to address challenges related to internal validity, the external validity of the findings could still be improved by extending the selection of case studies.

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