摘要
研究总消费有两大范式——新古典强调理性人跨期优化,马克思和后凯恩斯主义则强调劳资分配对总体消费率的影响。基于谢克对生产函数的批判,可以证明跨期优化下的消费的动态规律基本等同于利润率决定增长率的"剑桥增长方程"。然而,劳动收入份额不仅决定着总体消费率,还影响着总需求和收入的形成。基于马克思对消费行为的分析,本文在一个马克思-后凯恩斯资本积累框架下引入古典假定,抽象掉来自资本收入的消费,同时考察劳动收入份额对消费占比和总需求的双重影响,得到其与总消费之间的非线性关系。中国的数据很好地验证了该关系。结果表明,在当前积累体制下,提高劳动份额促进消费增长的空间有限,因为对利润的挤压会减少投资,进而减少总需求。因此,要促进总消费持续增长,就必须在提高劳动收入份额的同时,稳住投资水平,并通过技术创新提高潜在产能水平刺激投资增长,将需求管理和供给侧结构性改革有机结合起来。
There are two paradigms in the study of aggregate consumption:neoclassical economics emphasizes inter-temporal optimization,while Marxist and post-Keynesian economics emphasizes the impact of labor income share on the aggregate consumption rate.Based on Shaikh’s criticism of production function,it can be proved that the dynamics of consumption under intertemporal optimization is equivalent to the"Cambridge Equation,"in which the profit rate determines the growth rate.However,labor income share determines the consumption rate and affects the aggregate demand and income.Based on Marx’s analysis of consumer behavior,this paper introduces the classical hypothesis in a Marxist-post-Keynesian framework of capital accumulation,abstracts the consumption from capital income,and examines the dual effects of labor income share on consumption rate and aggregate demand,and obtains the nonlinear relationship between labor income share and aggregate consumption.China’s data are a good test of this relationship.The results show little room for increasing labor income share under the current accumulation system to promote consumption growth because profits squeezing will reduce investment,thereby reducing aggregate demand.Therefore,to promote the sustained growth of aggregate consumption and a stable domestic circulation,it is necessary to stabilize investment while increasing the share of labor income and improving potential productivity through technological innovation to combine demand management with supply-side reform.
作者
骆桢
张建堡
LUO Zhen;ZHANG Jianbao(Sichuan University,Chengdu,610065;Renmin University of China,Beijing,100872)
出处
《中国经济问题》
CSSCI
北大核心
2021年第4期5-20,共16页
China Economic Studies
基金
社科基金项目(项目号:19BJL005)的资助。
关键词
古典假定
劳动收入份额
总消费
非线性
classical hypothesis
labor income share
aggregate consumption
nonlinearity
