Public finance is an inclusive field of study based on different disciplines. This book brings together studies in different fields of public finance, taking into account the problems experienced on a global scale. The inclusiveness of public finance has brought together eighteen different studies in this book, including theoretical, methodological and empirical studies about various taxation problems such as COVID-19 and fiscal policies about healthcare system, financial incentives and biomass energy worldwide, effect of tax wedge on inflation, and the evaluation of the problems in international tax law; also digitalization and cryptocurrencies and the social effects of taxation. The authors of chapters present some new models and policy suggestions in their studies.