Data that can be obtained from explanatory variables and explained variables in economic data analysis papers. Explanatory variables and control variables are independent variables. In order to highlight the research problems, they are distinguished. Explanatory variable refers to the independent variable that has been re-studied, and it is the variable that researchers focus on how it affects the dependent variable. Control variables refer to non-research variables that have nothing to do with specific research objectives, that is, variables other than explanatory variables that researchers pay attention to and dependent variables that need to be measured. They are variables that researchers don't want to study and will affect the research results, so they need to be considered.