随着网络技术的深化发展，一种以平台为核心的数字经济流通模式开始盛行。本文以传播政治经济学为理论路径对数字平台进行解构与分析，试图以传播学视角去理解“数字平台”和以“平台化”为特征的媒介化社会；考察政治经济权力如何在互联网平台化的过程中运作并以平台经济的形式呈现；探讨在平台经济中，网民的地位何以确立，是如何卷入当下网络生产与剥削机制中；作为社会意识形态生产的重要部门，传媒文化娱乐产业如何在平台经济的裹挟下走向平台化等问题。 本文第一章分析了互联网从Web1.0到Web2.0的转变是整个互联网信息技术由技术创新到技术应用思维的转向需求。在Web2.0“互用性”与“交互性”的理念主导下，数字平台成为了互联网媒介化社会再结构的推动性力量。数字平台既是互联网时代的数字技术架构，也涉及政治、经济、文化、传播等多重权力的重构。通过对数字平台创新扩散的政治经济历程与技术话语演变之间的互动作用分析，本章揭示在数字平台成为互联网主导模式的过程中受到了政治经济力量的形塑，“共享经济”、“数据经济”等新经济与新技术修辞起到了为平台权力的合理性辩护的作用，平台经济语境中资本权力与技术合谋导致了隐私意识的弱化与民主表达的稀释。 第二章分析了在新的数字环境下，“稀缺资源”是如何被操控和利用，以造成垄断权力与社会不平等的。本章归纳了数字平台对稀缺资源的“数字圈地”有六种模式，分别为：1、大数据私有化；2、用户生成内容的格式化征用；3、主、客观连通性构建；4、网络规模化；5.注意力挖掘；6、可重用性基建与场景开发。本章揭示了数字资本的私有化与分布不均正造成并加剧着平台权力及数字网络社会的数字不平等。 第三章探讨了平台经济盛行的媒介化社会中数字劳动的新形式与新发展。本章认为在平台经济风潮中，知识劳动的生产模式与生产关系首先发生了新的变化。平台对社会实践的集聚与社会权力的重组重构了知识社会的劳动结构与价值增值模式。借助数字平台，数字媒介用户被卷入到数字媒体价值链中，服务于生产、消费和市场多个环节。平台经济、零工经济等新经济的流行催生了被称为“后工作社会”的零工社会，分布式资本主义在此时兴盛。平台经济促成新的价值生态链，并形成了以平台为手段，以数据为资源，以“数字劳动”为生产力，以互联网价值网为结构的新的利益循环网络模式。 文化产业具有特殊性，是社会意识形态与社会集体记忆的生产部门，本文在第四章讨论了平台经济模式下的文化产业转型，并且结合经验实例，以游戏产业的平台化发展与中国情境下的文娱平台经济发展为研究对象，探讨了数字平台如何重构文化产业问题，揭示了平台经济模式下商业资本的力量会进一步侵蚀文化生产过程。文化市场的垄断可能会导致监视和隐私之间的冲突，而受商业力量推动的文化发展态势将会导致社会公共空间在短期内被商业空间迅速占用的灾难。除此之外，平台化与全球化之间的关系也值得深思，在新自由主义全球化的趋势下科技公司对各行各业的渗透预示着一种基于数据和平台技术的平台经济的全球化。 在第五章中，本文总结了平台资本主义的垄断逻辑与资本集权体系。平台经济依托数字基础设施与网络本质，是资本主义在数字经济时代的一种深化形式。平台经济成为网络经济社会的主导逻辑有几个表现：首先，平台话语构成了网络经济社会的认知范型；其次，平台寡头的垄断格局已逐渐形成；最后，“物联网”平台成为实体经济平台化转型的普遍策略。除此之外，数字平台技术与平台经济的特性加深了平台资本主义的垄断逻辑：其一，“信息”与“关系”资源在产业供应端上实现了集中化；其二，平台能够实现“航母效应”，形成嵌套平台层次结构体系；其三，平台公司对多元市场进行着地毯式收割，平台资本主义的资本权力集中体系得以构建。 最后，本文认为数字平台已经成为了当下互联网生态社会中的媒介化力量，平台权力在这一过程中形成，当前流行的平台经济是一种垄断资本主义，数字能力是平台资本主义的内生需求。数字平台的商业化与垄断化对全社会的信息安全与公共利益构成了巨大的威胁。把公共利益寄托在私有平台公司的自我道德约束上是天真的，放纵商业平台寡头对公共传播基础设施形成垄断控制将会威胁普通公众的切身利益。本文倡导应当以适当的方式制约数字平台的垄断化，构建丰富多元的、以人为本的传播生态，建立良性的市场竞争机制与构建平等多元的网络公共空间。 【关键词】数字平台 平台资本主义 平台经济 数字劳动 传播政治经济学

With the deepening development of network society, the entire ecosystem of Internet is reconstructed by the platform. A platform - based digital economy circulation model is prevailing, known as "platform capitalism". In order to understand the "digital platform” and the mediated society characterized by "platformization” from the perspective of media studies,this dissertation deconstructs and analyzes the digital platform from a political economy of communication approach, tries to discuss the questions of why the network society has beer pluralistc and disributed no more, and then what course to follow; How do political and economic powers permeate in the platformizational process and which are present in the form of platform capitalism; How the status of the netizens under the platform logic be established, and how there are involved in the current capitalist production and exploitation mechanism; As an important section of the production of social ideology, how can the media culture and entertainment industry become platformization under the influence of platform capitalism. The first chapter of this dissertation analyzes the transformation of Internet from Web1.0 to Web2.0, which reflects the process of Internet technology transformation from technology innovation to technology application. Led by the concept of "interoperability" and "interactivity" in Web2.0, digital platforms have become the driving force of the social restructure in Internet mediated society. Digital platform has multiple dimensions of technology, economy, politics and society. Meanwhile, The innovation diffusion and technical discourse of social media have interactive effect of each other. This chapter suggests that the installation and development of new media technology have shaped by social powers in old systems, especially by the capital as the critical factor. Meanwhile, technical discourse changed followed the process of innovation diffusion, from the phase of anti-mainstream, empowerment, new economic to legalization. By the consequence, social media discourse legitimate the surveillance capitalism, the meaning of democracy be weakened. The second chapter analyzes how digital scarce resources are manipulated and utilized in the new digital environment that enhances monopoly powers and increase social inequality. There are six ways of digital enclosure for platform companies to acquire digital scarce resources: 1. Privatizing big data; 2. Expropriating user-generated content for free; 3. Constructing subjective and objective connectivity; 4. Scale development of Networks; 5. Attention mining; 6. Building reusable infrastructures and scenario developments. This chapter reveals that the privatization and uneven distribution of digital capital are causing and exacerbating the digital inequality of platform power and digital network society. The third chapter discusses the new forms and changes of digital labor in platform economies. It is believed that in the trend of platform economy, the production mode and production relationship of knowledge workers have changed. The agglomeration of social practices and the reorganization of social powers have reconstituted the labor structure and value added modes in the knowledge society. With the support of digital platform, digital media users are involved in the digital media value chains, serving the production, consumption and market segments. The popularity of new economies, such as platform economy and gig economy, gave birth to a society called "post-work society", where distributed capitalism flourished. Platform economies contribute to the formation of new value chain, and formed the new interest circulation network model, which by means of platform, based on data resources, taking digital labor as productivity, taking network value network as the structure. The cultural industry has its particularity and is the production department of social ideology and social collective memory. In the fourth chapter, the paper discusses the transformation of the cultural industry under different platform economy modes. Combined with empirical examples such as the platform evolution of the game industry and the entertainment platform under Chinese context, this chapter discusses how the digital platform restructures the cultural industry. It also reveals that the power of commercial capital under the platform economy mode will further erode the cultural production process. The monopoly of the cultural market may lead to a conflict between surveillance and privacy. Meanwhile, the cultural development driven by commercial power will lead to a disaster in which the public space is rapidly occupied by commercial space in the short term. In addition, the relationship between platform and globalization is also worth to explore. Under the trend of neoliberal globalization, the penetration of technology companies in all industries predicts a globalization of platform economy based on data and platform technologies. The chapter four discusses the monopoly logic and centralization system of platform capitalism. Platform capitalism rely on digital infrastructure and information productive forces, which is a kind of deepening form of capitalism in the era of digital economy. Platform capitalism has become the dominant logic of the net economy society with several manifestations: firstly, platform discourses become the cognitive paradigm of the net economy society. Secondly, the monopoly state of platform oligopolies has been gradually formed. Thirdly, the "Internet of things" platform has become common strategies for real economy platformization. Meanwhile, the characteristics of digital platform technology and platform economy have deepened the monopoly logic of platform capitalism: firstly, the resources of "information" and "relationship" are centralized on the industrial supply side. Secondly, the platform can realize the "carrier effect" and form a nested platform hierarchy system. Thirdly, the platform companies have undertaken the reaping of the multiple markets, and the capitalist power systems of platform capitalism have been built. Finally, this paper finds that the digital platform has become the mediated force in the current network society. Platform powers are formed in this process. The current popular platform economy is a kind of monopoly capitalism and digital capability is the endogenous demand of platform capitalism. The commercialization and monopolization of digital platforms throws a great threat to the information security and public interests of the entire society. It is naive to place public interest on the self-ethical constraints of private platform companies. Indulging business platform oligarchs to form monopoly control over public communications infrastructure will threaten the vital interests of the general public. This article advocates that the monopoly of digital platforms should be constrained in a proper way. A rich and diverse humanized communication ecosystem should be constructed. A competitive market competition mechanism and an equitable and diverse network public space should also be constructed. Keywords Digital platform; Platform capitalism; Platform economy; Digital labour; Political economy of communication