三次产业贡献率与三次产业投资的变化趋势耿春普编者按投资效益是指固定资产投资活动中投入与产出之间的比率。投资效益的好坏是考核一个建设项目是否成功的标志。投资效益可以从微观、宏观、经济、社会、建设过程、生产领域等多角度观察。影响投资效益的因素也是多方面的... The contribution rate of three industries and the trend of investment in three industries Geng Chunpu Editor’s Note: Investment efficiency refers to the ratio between input and output in the investment activities of fixed assets. The quality of investment is a sign of the success of a construction project. Investment benefits can be observed from multiple perspectives, such as micro, macro, economy, society, construction process and production area. The factors that affect the return on investment are also multifaceted ...