This article investigates to what extent and how public-private innovation networks in services (PPINSs) can provide an original understanding of servitization-based innovations in ecosystems. To do this, we examined the biopharmaceutical industry in the Ile-de-France region in north-central France. We performed a longitudinal study from 2005 to 2016, building on structural holes and personal network efficiency methodology. Our results confirm the centrality of public actors in structuring and diffusing knowledge within a PPINS; the role of structural holes in controlling and filtering transferred knowledge, the main beneficiaries of which are private actors; and finally, the evolution and development of the PPINS around these central private/public actors. The network reveals that product-service innovation in the sector would be difficult to achieve without complex private/public interdependencies (knowledge, big data, logistics, digital therapies, etc.). Our paper also stresses on the need to move forward the public economic model from a public service into an innovative service to the public.

本文探讨了公私创新服务网络 (PPINS) 在多大程度上以及如何能够提供对生态系统中基于服务化的创新的原始理解。为此，我们考察了法国中北部法兰西岛地区的生物制药行业。我们从 2005 年到 2016 年进行了一项纵向研究，建立在结构漏洞和个人网络效率方法的基础上。我们的结果证实了公共行为者在 PPINS 内构建和传播知识的中心地位；结构性漏洞在控制和过滤转移知识中的作用，其主要受益者是私人行为者；最后，围绕这些中央私人/公共行为者的 PPINS 的演变和发展。该网络表明，如果没有复杂的私人/公共相互依存关系（知识、大数据、物流、数字疗法等），该行业的产品服务创新将难以实现。我们的论文还强调需要将公共经济模式从公共服务转变为创新的公共服务。