This book is a compendium on economics specially designed for development practitioners and civil-society activists who do not have formal training in the subject. It provides an understanding of microeconomics, knowledge of the macroeconomic environment and insights from the specialized area called development economics. Through separate chapters, it covers poverty, inequality, social and gender discrimination, and environmental impact. Economics in Action provides the necessary knowledge to participants of public debates who do not have a background in economics and would like to reinforce their arguments and analyses with sound economic theory. It also carries specific tips on using economics in development practice and interventions. The author, in general, tries to relate the ideas and relationships described in economics with the real-world problems that we may encounter as part of our lives.