How does second-child behavior affect self-employment?

This paper focuses on the relationship between fertility and population employment, and studies the influence of second-child birth behavior on residents' self-employment. Through linear model regression, it is found that the second-child fertility rate has a significant positive impact on the self- employment rate, and the results of PSM-DID regression show that residents' second-child birth behavior has a significant positive impact on residents' self-employment income, that is, from both the macro social perspective and the individual perspective of residents, second-child birth behavior will promote residents' self-employment.