This book explores consolidation in the Nigerian insurance sector. It contains a review of concepts, theories, empirical studies, etc. The proxies of consolidation such as capital base, total assets, total premium and liquidity are used to assess operational efficiency of composite insurance firms. The pooled least square method, fixed effect model, random effect model and the Hausman test are applicable estimation techniques. Readers will be able to assess the success or otherwise of consolidation in Nigerian insurance firms. This book also provides knowledge base for policy makers to assess the impact of their policy statement and implementation.