本文在将搜索理论和经典的经济增长理论结合的基础上引入生产性政府花费,讨论了政府花费对就业和消费的影响。利用最一般的生产和效用函数,证明了均衡状态存在的唯一性。当失业工人和空闲职位的匹配是有效时,表示经济系统的四维动力系统存在一个稳定的二维流形。 Based on the combination of search theory and classical theory of economic growth, this paper introduces productive government expenditure and discusses the influence of government expenditure on employment and consumption. Using the most general production and utility functions, we prove the uniqueness of equilibrium. When the match between unemployed workers and vacant positions is valid, it indicates that there exists a stable two-dimensional manifold in the four-dimensional dynamical system of economic system.