With the rapid development of China’s digital economy, promoting the digital countryside construction has become the strategic focus and priority development direction of rural revitalization and common prosperity. This paper combines the county-level digital countryside index with the data from the China Household Finance Survey to empirically analyze the impact and mechanism of the digital countryside construction on household income. The results show that the digital countryside construction can significantly improve the level of household income. After the endogenous analysis and the robustness test, this core conclusion is still valid. From the perspective of mechanism test, the digital countryside construction can increase household income by promoting household entrepreneurship and nonagricultural employment. Heterogeneity analysis shows that there is no significant difference in the income-increasing effect of the digital countryside construction, whether urban or rural households, or households with different human capital and social relations, which means that the digital countryside development has the characteristics of inclusiveness and sharing. Under the background of unswervingly taking the road of common prosperity for all Chinese people, this paper provides some micro-evidence for how the digital economy can contribute to household income growth, as well as provides a useful reference for the implementation of the digital China strategy.

The reduction and efficiency of fertilizer use has been a recent focus of governments and scholars. As a new agricultural technology, controlled-release fertilizer can not only increase yield and save labor, but also improve efficiency and reduce the use of fertilizer, thus promoting sustainable agricultural development. Drawing on a sample of 231 farmers of Jiangsu Province, China, this paper applies a probit model to assess the adoption behavior of controlled-release fertilizer by large-scale households in terms of three dimensions of social network, i.e., communication intensity, trust level, and network size, specifically exploring how science popularization influences their adoption intention, and comparing the heterogeneity of impact that social network has on the adoption intention of farmers when the information is obtained adequately or not. The empirical results demonstrate that: (1) At the early stage of technology diffusion, the size of social network has a positive effect on farmers’ cognition of controlled-release fertilizer, and the communication intensity with neighboring farmers has a positive effect on the adoption behavior of controlled-release fertilizer; (2) Farmers’ adoption intention of controlled-release fertilizer is significantly influenced by their original knowledge of new technology and science popularization; (3) When the information is sufficient, the social network of large-scale households has no significant effect on their willingness to adopt. Therefore, in promoting controlled-release fertilizer, the government should highlight the synergistic effect of farmers’ cognition and science popularization activities, fully consider the characteristics of farmers’ social network, facilitate the infrastructure of rural informatization, and regulate the agricultural promotion networks so that farmers can obtain sufficient and effective information.

Improving the level of public service expenditure is the basic condition to meet people’s growing yearning for a better life in a new era. This study aims to examine the influence of promotion incentive and population mobility on public service expenditure. With the panel data of 30 provinces (excluding Tibet, Hong Kong, Macao and Taiwan) in China from 2010 to 2018, a fixed effect model was employed to conduct the empirical research first, and then analyze the heterogeneity of the impact. In addition, the robustness was examined by substituting core explanatory variables and explained variables and using the spatial econometric model. Results indicated that promotion incentive and population mobility had significant negative effects on public service expenditure (medical care, education, culture, sports and media, social security and employment). By replacing the explained variables and the core explanatory variables and using the spatial economic model, the research conclusion was still stable and reliable. In different regions, promotion incentive and population mobility had different effects on different types of public service expenditure. In addition, it was revealed that the improvement of the urbanization level, economic development level, population density, residents’ education level and the proportion of tertiary industry had a significant positive impact on public service expenditure. The findings in this study can provide useful references for policy makers to allocate public service expenditure.

Exploring the evolution law of health production efficiency and its influencing factors in China is conducive to maximizing the promotion of health output under the constraints of limited resources, and is useful for alleviating medical resource shortages and solving the problems of expensive and difficult medical treatment and medical treatment for the public. The stochastic frontier production function is used to calculate the health production efficiency in China and discuss its evolution law using panel data from 31 provinces in China from 2002 to 2018. At the same time, the factors that affect the health production efficiency are empirically tested. The study discovered that China's regional health production efficiency exhibits a spiral rise—a relatively stable evolution trend, and overall efficiency performance is acceptable. There are significant spatial differences in regional health production efficiency. The efficiency gap between the country and the three traditional economic zones tends to narrow. In addition, with the exception of Northwest China, the efficiency of other comprehensive economic zones has absolute convergence characteristics. The level of urbanization, the degree of government attention, the reform of the medical and health system, and population density all have a positive impact on health production efficiency. Medical insurance coverage has not passed the significance test. Despite unfavorable factors such as current exam-oriented education and the continuous expansion of college enrollment, the increase in the number of years of education received by residents did not promote, but rather hampered, the efficiency of regional health production.