For the ranking of the 100 most influential economists in Germany, the FAZ assesses the economists in several areas. Beyond the number of scientific citations, these include the survey of parliamentarians and the number of mentions in print and online media such as FAZ, Süddeutsche Zeitung, Bild, Handelsblatt or Spiegel. Also, mentions in social media such as Twitter factor in. The first place in the ranking goes to Ernst Fehr of the University of Zurich, Clemens Fuest of the Ifo Institute came second, and Hans-Werner Sinn of the LMU Munich came third.
Weblink to the full ranking by FAZ (in German): https://www.faz.net/aktuell/wirtschaft/wirtschaftswissen/f-a-z-oekonomenranking-2019-die-tabellen-16393825.html
Weblink to the Climate Policy Special Report on Options for CO2 pricing, which Ottmar Edenhofer has elaborated for the German government: https://www.pik-potsdam.de/news/press-releases/pik-and-mcc-contribute-to-climate-policy-special-report-for-german-government?set_language=en