制造业产品质量供给能力及其影响机制研究

在产品质量供需结构性错位背景下,从供给侧出发,本文引入质量内生决定模型測算2005-2018年制造业产品质量供给能力,构建制造业产品质量供给能力影响机制模型。研究表明:质量需求、产品价格、生产率、质量激励政策与质量供给能力呈显著正相关,数量需求、投入品成本和技米创新水平与产品质量供给能力存在负向关系。质量激励政策可以提高制迻业质量供给能力及其稳定性,并存在政策实施的空间延展性和时间衰减性,需要持续改进与优化质量激励政策,保障政策实施的效率和协同性。     

幺半群上的斜强可逆环

For a monoid M, we introduce the concept of skew strongly M-reversible rings which is a generalization of strongly M-reversible rings, and investigate their properties. It is shown that if G is a finitely generated Abelian group, then G is torsion-free if and only if there exists a ring R with |R| ≥ 2 such that R is skew strongly G-reversible. Moreover, we prove that if R is a right Ore ring with classical right quotient ring Q, then R is skew strongly M-reversible if and only if Q is skew strongly M-reversible.