Probability theory and mathematical statistics. The biggest difference between econometrics and mathematics is that the study of certainty has turned to uncertainty, and the nature and significance of its research object will change greatly. In mathematics, it is enough to thoroughly understand advanced mathematics, probability theory and mathematical statistics.

Econometrics is divided into theory and application, with different directions.

Theoretical econometrics focuses on introducing and studying the theories and methods of econometrics, focusing on the mathematical proof and derivation of theories and methods, which is closely related to mathematical statistics. Theoretical econometrics not only introduces the mathematical theoretical basis of econometric model and the commonly used parameter estimation methods and test methods of econometric model, but also studies the estimation methods and test models of special models.

Apply? Applied econometrics focuses on the establishment and application of econometric models, the economic and economic statistical basis of applied models, and the handling of practical problems in the process of model establishment and application.