摘要
本文将帕累托收入分布、等级偏好以及与创新产品效用不可分的同质产品引入创新驱动增长模型,研究了居民收入差距经由需求引致创新机制对经济增长的影响。理论模型完整地刻画了需求引致创新机制,其中帕累托收入分布的形状参数直接决定了创新产品的价格效应和市场规模效应。数值模拟发现:鉴于较大的收入差距,市场规模效应对需求引致创新发挥主导作用,更加均等的收入分布有助于经济体跨入更高的增长轨道;对于既定的收入分布,调整居民消费结构将经由需求引致创新机制对经济增长率和投资率产生影响;基尼系数与社会效用呈非线性递减关系,过大的收入差距会造成严重的福利损失。本文为扩大内需、实现消费和产业“双升级”以及构建“供给与需求更高水平动态平衡”提供理论借鉴和参考价值。
This paper introduces the Pareto income distribution, hierarchic preferences, and homogeneous products which inseparable from the utility of innovative products into the innovation-driven growth model, then studies the impacts of income disparity on economic growth through demand-induced innovation.The theoretical model analyses the demand-induced innovation mechanism completely, in which the shape parameter of Pareto income distribution directly determines the price effect and market scale effect of innovative products.Numerical simulations find that, given the large income gap, market scale effect plays a leading role in demand-induced innovation, and a more even income distribution helps the economy to enter a higher growth trajectory;for the established income distribution, adjusting the consumption structure of residents also has an impact on the economic growth rate and investment rate through demand-induced innovation;the Gini coefficient has a non-linear decreasing relationship with social utility, and excessive income disparity can cause serious welfare losses.This paper provides theoretical value and reference signification for expanding domestic demand, upgrading both consumption and industry, and constructing a higher-level dynamic balance of supply and demand.
作者
孙巍
夏海利
Sun Wei;Xia Haili(:Center for Quantitative Economics,Jilin University;:School of Business and Management,Jilin University)
出处
《经济评论》
CSSCI
北大核心
2022年第4期3-20,共18页
Economic Review
基金
教育部人文社会科学重点研究基地重大项目“新常态下促进经济稳定增长的要素配置与产业升级政策研究”(项目编号:16JJD790015)
吉林省社会科学基金项目“吉林省居民收入分布变迁与消费升级路径研究”(项目编号:2020C026)的资助。
