This book examines the main issues discussed in the field of public finance. It covers critical debates such as revenue forecasting models, the taxation of sharing economy, tax incentives to green bonds, tax literacy, collective investment institutions, digitalization of tax administration, pharmaceutical spending, tax expenditures, Armey Curve, Okun's law, private educational institutions, and taxation of artificial intelligence. The book consists of twelve chapters on "controversial issues in the public finance" mentioned above.