Plan S and publishing: reply to Lehtomäki et al. 2019.

The revised Plan-S implementation guidance mandates that from 2021, scientific publications that result from research funded by public grants must be published in compliant open-access journals. When the cost of publication is borne by readers, all 3 issues are problematic. Lehtomäki et al. suggest that under Plan S, regulation of author publication charges (APCs) may address the high cost of publication if the regulation of fees is effective. [Extracted from the article]