Book excerpt: This book presents an up-to-date overview of the theory as well as the empirics of the relationship between investment, financial imperfections and uncertainty. After reviewing the capital market imperfections literature and the empirical results, the authors discuss both traditional investment models with uncertainty and the more modern option based models. They present an overview of empirical results of the modelling of investment under uncertainty. In these examples the effects of capital market imperfections on investment are carefully considered. The authors conclude that there is overwhelming empirical support for a negative uncertainty-investment relationship. This book should appeal to academics with an interest in investment theory, professionals in the financial sector and students of macroeconomics and finance. "Investment, Capital Market Imperfections, and Uncertainty" assumes only a basic knowledge of mathematics and is easily accessible.