Free school meals and cognitive ability: Evidence from China's student nutrition improvement plan.

The China Student Nutrition Improvement Plan (SNIP) covers 40.6 million students in the compulsory education stage, accounting for 42% of all students enrolled in rural compulsory education in 2021. This paper utilizes the county-by-county rollout of the SNIP and estimates the effect of this nutritional intervention on students' cognitive outcomes. We find that SNIP increases math test scores but has a statistically insignificant effect on verbal achievement. The effect is greater for middle school students and children from disadvantaged families. The SNIP affects the cognitive performance of students by improving their health status, increasing school attendance, fostering good study habits, raising educational expectations, and improving the human capital of peers.

Underdog entrepreneurship in the digital era: The effect of digital servitization on household entrepreneurship in China.

In today's digital era, households are empowered by digital servitization, which could potentially impact their ability to become entrepreneurs. Using data from the China Family Panel Studies (CFPS) and the National Bureau of Statistics of China, we construct the digital servitization index to analyze the impact of digital servitization on household entrepreneurship. The results show that the utilization of digital servitization by households significantly increases the likelihood of them engaging in entrepreneurial endeavors. This result remains robust after a series of robustness tests. We also find that digital servitization can help households identify entrepreneurial opportunities and access entrepreneurial resources by alleviating information and financial constraints, and increasing social capital. Further, the effect is more among households with rural residences, low material assets, elderly household heads, and household heads with low cognitive abilities, which means that digital servitization can promote underdog entrepreneurship. In conclusion, this paper provides micro-level evidence supporting the idea that digital servitization can foster household entrepreneurship, particularly among underprivileged groups. Ultimately, this paper highlights the potential of digitization as an essential resource to drive economic growth and help households in need become successful entrepreneurs.

Nutrition improvement program for rural compulsory education students and individual health.

We use the county-by-county rollout of the program and employ the difference-in-difference (DID) methodology to identify the effects of the implementation of the nutrition improvement program for rural compulsory education students on adolescent health. The results show that the nutrition improvement program reduces the frequency and probability of illness and improves the students' health status. The heterogeneity analysis indicates that the children in western regions and children left behind have a greater marginal improvement. It finds that the nutrition improvement program for rural compulsory education students improves adolescent health through diversifying nutrition intake to alleviate malnutrition and developmental delay in impoverished areas. The program can promote adolescent health in impoverished areas, which has a role in improving regional health disparities and alleviating the intergenerational entrenchment of poverty.

Effects of socio-economic factors on research over systemic sclerosis: an analysis based on long time series of bibliometric data.

BACKGROUND: Systemic sclerosis (SSc) is a rare detrimental disease warranting global research efforts. Evaluating how socio-economic factors impact country research output on SSc could help to identify solutions advancing research. METHODS: Publication production on SSc during 1969-2018 and data for structural and policy factors for WHO member countries were collected from public sources. Associations between SSc research output and country-level factors were investigated through panel regression. Difference-in-differences analysis further assessed the causal effects of rare disease legislation. RESULTS: SSc publications demonstrated exponential growth (r = 0.9410, as against an r = 0.8845 after linear adjustment), but were concentrated in high-income countries (HICs). Ten countries, nine of which were HICs, published 12,261 (77.5%) SSc publications but another 87 countries produced none. Gross domestic products (GDP), population and expenditure on research and development were positively associated with SSc publications (p < 0.001). Higher health expenditure was only found to be associated with increased SSc publications in HICs (p < 0.001). Rare disease legislation increased annual publication production by 62.8% (95% CI 0.390-0.867; p < 0.001) averagely. In middle-income countries (MICs), the effect was especially swift and lasting. No significant impact was found with GDP per capita, female percentage, and political indicators. CONCLUSIONS: SSc research output increased over time with substantial country disparities. Effective health policies facilitating research should be expanded especially among MICs to accelerate research advancement.