经济模型在研究宏观经济问题中具有重要的、不可替代的作用。在建模过程中,依据经济理论、实际经济运行情况,以及研究经验,在选择变量后模型技术创新就成为一个关键的问题,这也是十分困难的问题。正因为如此,许多学者投入大量精力潜心研究,发展了建模技术,取得了丰富的成果。葛 Economic models play an important and irreplaceable role in the study of macroeconomic issues. In the modeling process, based on economic theory, actual economic operation and research experience, model technological innovation becomes a key issue after selecting variables, which is also a very difficult issue. Because of this, many scholars put a lot of energy into research, developed the modeling technology, and achieved rich results. Ge