Dietary Structure and Grain Security for the period 2001-2022 in China

Considering data availability, this study selects panel data from 31 provinces (including municipalities and autonomous regions) across the country for the period 2001-2022 to examine the impact of dietary structure upgrading on grain security. Two main reasons justify the choice of this sample period: first, prior to 2001, there was a significant lack of relevant dietary consumption data across regions, coupled with significant variations in statistical standards; second, data at the provincial level for multiple indicators discussed in the study have not yet been updated after 2022. Therefore, this represents the most comprehensive sample range currently available.Herein, the primary core variables, mechanism variables, and relevant control variables were sourced from the China Statistical Yearbook, China Rural Statistical Yearbook, China Agricultural Yearbook, China Financial Yearbook, and China Population and Employment Statistical Yearbook, as well as from information provided by the Ministry of Commerce and statistical yearbooks from various provinces, municipalities, and autonomous regions. To mitigate the adverse effects of outliers, all data were winsorized at the 1% and 99% percentiles.