Bernhard Mittermaier

Library Director, Forschungszentrum Jülich

Open Access Expertise

Extensive Open Access Involvement

Professional Role


Field of Open Access Expertise

Open Access advocacy Open Access business models Open Access industry players Open Access metrics Open Access rights Open Access tools

Areas of Open Access Interest

Country-Level or Comparative Information Market Research on Open Access Open Access and Open Research Guidelines Open Access Case Studies Open Access in Western Europe Open Access Policies and Mandates

Influencer Of


Rooms participated in:

Deutschsprachiger Open-Access-Raum

Recent Comments

May 20, 2021

I have made some critical remarks with respect to this study, cf. (in German), as well. The main points are:

  1. The study reports an increase from German authors (= DEAL)  by 5.29 percentage points in the journals under investigation as compared to 3.40 percentage points for authors from other countries. However, the starting points where different (Germany 29.32% share vs. 18.69% share in the control group). The actual, relative increase in both groups is the same: the respective shares grew by 18%.
  2. The study compares only DEAL publishers vs. all other publishers and detects an increase for the DEAL publishers. Yet, other publishers (APS, IEEE, Sage) have similar growth rates, whereas two Gold Open Access publishers (MDPI and Frontiers) have growth rates one order of magnitude larger.
  3. The “large vs. small publishers” game isn’t working out as expected at all: The combined share of Elsevier, Springer Nature and Wiley for German corresponding authors was 50.7% in 2017 and is at 48.6% in 2020.