Science and Public Policy, 2018, https://doi.org/10.1093/scipol/scy005

This article has been amended to add details not included in the version originally published online. The following note has been added:

‘The authors are open to providing the SQL and Stata code that generated the estimation data. Also, if requested, we can provide the raw data, however, these data are protected. The researcher would need to sign a Non-Disclosure Agreement before we could send them the data.’

The following has also been added to the Acknowledgements:

‘We wish to especially thank Professor James Brander from the Sauder School of Business, the University of British Columbia for reading the paper and providing helpful comments.’

The article has been updated online to reflect these changes.

This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model (https://dbpia.nl.go.kr/journals/pages/about_us/legal/notices)