近年来随着法制实践的发展,我国宪法理论研究出现了向专题化方向发展的新的趋向。专题的理论研究不仅有助于推动宪法实践本身的发展,而且能够强化宪法理论的实践功能,标志着宪法理论研究的成熟程度。甄树青博士著《论表达自由》(社会科学文献出版社2000年6月版)一书是宪法学专题研究方面的重要研究成果,为基本权利理论的深入研究提供了有益的线索与丰富的理论依据。作者在庞大的基本权利理论体系中选择表达自由作为研究的课题,其研究方法具有重要的理论价值。过去在宪法学理论研究中,普遍存在的一个问题是课题研究包含的问题过大,研究课题所需要的认识工具与知识总量存在一定的局限性。在这种情况下进行的研究往往缺乏深度,不能集中对相关课题进行多层面的分析与探讨。本文作者根据掌握的资料和所要研究的问题的性质,从概念、功能、界限、理论构成、实 In recent years, with the development of legal practice, there has been a new trend in the study of constitutional theory in our country toward the thematicization. The thematic study not only helps to promote the development of the constitutional practice itself, but also strengthens the practical functions of the constitutional theory and marks the maturity of the theoretical research of the constitution. The book “On Freedom of Expression” (Social Science Academic Press, June, 2000) is an important research result in the field of constitutional studies and provides useful clues and rich theoretical basis for the in-depth study of basic rights theory . The author chooses freedom of expression as a research topic in a huge theoretical system of fundamental rights and his research methods have important theoretical value. In the past, in the study of constitutional law, a common problem is that there are too many problems involved in the study of the subject. There are some limitations on the knowledge tools and knowledge needed for the research topic. The research carried out under such circumstances often lacks depth and can not focus on the multi-level analysis and discussion of related topics. According to the information we have and the nature of the problem to be researched, the author of this dissertation, from the concepts, functions, boundaries and theories,