Abstract: The four new models, separately production function model, logarithm linearity model, linearity-logarithm model and mixed model including linearity and logar ithm, which are used in analysis of contribution and elasticity of investment in highway construction to economic increasement, are discussed in detail and formulated. From 1980 to 1999, Chinese contribution and elasticity of investment in highway construction to economic increasement are analyzed, and come out the conclusion that investment in highway construction may gain more economic increasing than the investment in other fields.

Key words: investment in highway construction, economic growth, degree of contribution, coefficient of elasticity, model

摘要： 笔者提出了公路交通建设投资对经济增长的贡献度和弹性系数的4种新的计算模型:生产函数模型、对 数-线性模型、线性-对数模型和线性与对数的混合模型,并对其进行了详细地讨论,导出了他们的计算公式,利 用混合模型,对我国从1980年至1999年公路建设投资对经济增长的贡献度和弹性系数进行了分析,得出了投 资交通建设比投资其他建设更易促进经济增长的结论.

关键词: 公路建设投资, 经济增长, 贡献度, 弹性系数, 模型