RT journal article T1 Effects of co-patenting across national boundaries on patent quality. An exploration in pharmaceuticals A1 Acosta Seró, Manuel A1 Coronado Guerrero, Daniel A1 Medina Zamora, Jennifer A2 Economía General K1 Patent quality K1 collaborative patent K1 international collaboration K1 pharmaceutical industry AB This paper explores three novel research questions. First, is an increase inthe number of countries involved in ownership of a co-patent an effectiveway to enhance patent quality? Second, if the objective is to raise patentquality, which are the right countries to collaborate with? And third, doescooperation with partners located in a tax haven affect patent quality?The empirical methodology relies on forward citations as an indicator ofquality, and patent co-ownership as a measure of internationalcollaboration. Our econometric findings show that, first, the averageeffect of international collaboration is a 4.9% increase in patent qualitycompared with those patents for which the assignees come from asingle country (once we controlled for patent characteristics). When thenumber of countries in which the assignees are based increases, theeffect of this wider collaboration on patent quality is also greater,though only for up to a maximum of five countries. Second, to producepatents of better quality, the most suitable countries with which tocollaborate were found to be the United States, Switzerland, Japan,Germany and the United Kingdom. Finally, collaboration with firmslocated in a country categorized as a tax haven does not have anysignificant impact on patent quality. PB Taylor and Francis SN 1476-8364 YR 2024 FD 2024 LK http://hdl.handle.net/10498/34209 UL http://hdl.handle.net/10498/34209 LA eng DS Repositorio Institucional de la Universidad de Cádiz RD 07-nov-2026