Template-Type: ReDIF-Paper 1.0 Author-Name: Alice Guerra Author-Name-First: Alice Author-Name-Last: Guerra Author-Workplace-Name: University of Bologna - Department of Economics Author-Name: Tapas Kundu Author-Name-First: Tapas Author-Name-Last: Kundu Author-Workplace-Name: Oslo Business School, Oslo Metropolitan University; School of Business and Economics, UiT the Arctic University of Norway Title: The Role of Legal Presumptions in Patent Litigation Abstract: We formally analyze the effects of legal presumptions in patent litigation. We set up a novel contest model to study litigation outcomes, judgement errors, and resource dissipation under three alternative presumption criteria: a presumption that the patent is valid; a presumption that the patent is invalid; no presumption regarding validity. Our findings reveal that any legal presumption – either in favor of validity or invalidity – is preferable than a no-presumption criterion when there is high uncertainty about the patent’s objective merit. Classification-JEL: K41, C72, D74 Creation-Date: 2019-10-29 File-URL: https://doi.org/10.2139/ssrn.3477505 File-Format: text/html DOI: 10.2139/ssrn.3477505 Keywords: Patent, Litigation, Presumptions, Persuasion Handle: RePEc:oml:wpaper:201905