AUTHOR=Dürr Salome , Brookes Victoria J. , Perez Andres M. TITLE=Editorial: Principles and Challenges of Fundamental Methods in Veterinary Epidemiology and Economics JOURNAL=Frontiers in Veterinary Science VOLUME=8 YEAR=2021 URL=https://www.frontiersin.org/journals/veterinary-science/articles/10.3389/fvets.2021.705980 DOI=10.3389/fvets.2021.705980 ISSN=2297-1769