The book provides an overview of the policy frameworks that have been employed to support offshore wind power, and their efficacy in nurturing sustainable cost reductions across the industry.A growing number of countries are increasingly receptive to the prospect of implementing policies to support the deployment of large-scale renewable energy. The promise of carbon-free, utility-scale power generation from offshore wind farms has incentivised and nurtured offshore wind development. However, the high relative costs of deploying offshore wind compared to alternatives have a history of making it political divisive pursuit. At the same time when many countries are just beginning to explore the possibility of developing an offshore wind industry, many other countries are experiencing what can be described as policy fatigue over supporting offshore wind. If cost reductions are not proven sustainable by the early 2020's, then government support for offshore wind may start to erode and even completely evaporate in several key offshore wind markets - with global repercussions. This book will provide the reader with a clear picture of the current status and future challenges of the offshore wind industry globally, incorporating both a technical analysis of the cost drivers as well as a detailed analysis of policy design and economics of industry.