前言经济学中的实证分析通常包括提出假说、建立模型和经验检验等几个环节。本文没有严格按照实证分析所要求的步骤进行,只是根据经济学的有关理论,对可以获取的数据进行了分析,因此叫做经验分析(em- pirical analysis)。一、问题的提出长期以来,我国主要依靠增加投入来推动经济的增长。据测算,1953年至1990年,生产要素投入对国民 Foreword Empirical analysis in economics usually includes several aspects such as making hypothesis, establishing model and empirical testing. This article does not follow exactly the steps required for empirical analysis, but analyzes the available data based on the theory of economics and is therefore called em- pirical analysis. First, the issue put forward For a long time, our country mainly rely on increased investment to promote economic growth. It is estimated that from 1953 to 1990, the factors of production invested in the nationals