This Handbook is a comprehensive anthology of up-to-date chapters contributed by current researchers in budget forecasting. Editors Daniel Williams and Thad Calabrese had previously found substantial deficiencies in public budgeting forecast literature with current research failing to address such matters as practices related to forecasting expenditure factors, the consequences of forecast bias, or empirical examination of the effectiveness of many deterministic methods actually used by many governments. This volume comprehensively addresses the state of knowledge about budget forecasting for practitioners, academics, and students and serves as a comprehensive resource for instruction alongside serving as a reference book for those engaged in budget forecasting practice.