Abstract: To explain clearly the mechanism of the symbiotic development of stateowned economy and private economy in theory is the need to better adhere to “two unswervingly”.Based on LotkaVolterra model,this paper theoretically proves the symbiosis of stateowned economy and private economy and how the “1+1 >2”effect realizes. Based on the time series data of stateowned and private listed companies from 1992 to 2018, the empirical analysis result using VAR model shows that the development of stateowned economy promotes the expansion of market scale and contributes to the development of private economy; the development of private economy promotes the expansion of market scale and contributes to the development of stateowned economy; the expansion of the market has expanded the development space for the symbiotic development of the stateowned and private economies, and promotes mutual cooperation and winwin results between the two. From the perspective of market scale effect, this paper explains the mechanism of the symbiotic development of stateowned economy and private economy.

Key words:  , stateowned economy, private economy, symbiotic development, market scale effect, LotkaVolterra model, VAR model

摘要： 从理论上阐释清楚国有经济与民营经济共生发展的机理，是更好坚持“两个毫不动摇”的需要。本文基于LotkaVolterra模型，从理论上证明了国有经济与民营经济共生发展，实现了“1+1>2”的效应。本文利用1992—2018年国有上市公司与民营上市公司时间序列数据，使用VAR模型的实证分析结果显示：国有经济发展，推动市场规模扩大，有助于民营经济发展；民营经济发展，推动市场规模扩大，有助于国有经济发展；市场规模扩大为国有经济与民营经济共生发展拓展了发展空间，促进二者相互合作、互利共赢。本研究成果从市场规模效应视角，解释了国有经济与民营经济共生发展的机理。

关键词: 国有经济, 民营经济, 共生发展, 市场规模效应, LotkaVolterra模型, VAR模型