The writing and the quality of a comprehensive graduate textbook on “Public Economies” such as the present one relies upon many discussions, recommendations, and comments from students, colleagues, and fellow researchers. This book grew out of first- and second-year graduate-level introductory courses to public economics at the Universities of Augsburg and Bolzano. Parts of this book have also been taught as PhD courses on pension and debt policies at the Universities of Luxembourg and Leipzig. I would like to thank many graduate students from Augsburg, Bolzano, Leipzig, and Luxembourg for their valuable input into this book and for their patience during my courses while I was testing the material on them.

一本关于“公共经济”的综合性研究生教科书（如本书）的写作和质量取决于学生、同事和研究人员的许多讨论、建议和评论。这本书出自奥格斯堡大学和博尔扎诺大学公共经济学一年级和二年级的入门课程。这本书的部分内容也在卢森堡和莱比锡大学以博士课程的形式教授养老金和债务政策。我要感谢来自奥格斯堡、博尔扎诺、莱比锡和卢森堡的许多研究生，感谢他们对本书的宝贵投入，感谢他们在我的课程中耐心等待，而我正在测试这些课程的材料。