Rapid economic growth is accompanied by the continuous degradation of the environmental quality, low efficiency of natural-resource utilization and increasing health losses. With the growing environmental problems, countries in the world have gradually attached importance to environmental protection and regulation. As an effective means of environmental protection by the government, environmental regulation’s role in high-quality development cannot be understated. On the basis of a two-way fixed-effects model, the panel data of 276 prefecture-level cities of China during the period 2007–2016 were used to explore the effect of environmental regulation on China’s export technology structure, and the influence mechanism between the two. Moreover, panel quantile regression was used to examine the heterogeneity of the effect of environmental regulation on the export technology structures of Chinese cities with distinct technological levels. The empirical results prove that environmental regulation can boost the upgrade of China’s export technology structure by encouraging innovation. Furthermore, the impact of environmental regulation on China’s export technology structure changes according to the export technical complexity. With the improvement in the export technology structure, the boost effect appears as an inverted U-shaped change.

Maximizing or improving residents’ subjective well-being is one of the basic purposes of public expenditure. As an important component of public expenditure, the impact of public health investment on residents’ subjective well-being receives considerable attention. Regarding the empirical evidence, this paper measures residents’ subjective well-being from the perspectives of overall cognitive happiness, life satisfaction, positive emotions and negative emotions, on the basis of a multi-level structural model of subjective well-being. Factor analysis is used to estimate the subjective well-being of residents at the province level in China, based on the China Family Panel Studies of 2018. In addition, structural equation modeling is employed to explore the impact of public health investment and its regional disparity on the subjective well-being of residents. The empirical results show that public health investment has a significant positive effect on residents’ subjective well-being. Moreover, there is an inverted U-shaped relationship between the regional disparity of public health investment and residents’ subjective well-being. Further study illustrates that the effects of public health investment and its regional disparity on residents’ subjective well-being are heterogeneous by group. Public health investment has a greater impact on the well-being of low- and middle-income, eastern and urban residents than high-income, midwest and rural residents.