Based on DID to study the price of agricultural products in Chengdu under the novel coronavirus pneumonia

The novel coronavirus pneumonia has had a great impact on the prices of agricultural products. The current domestic research focuses on theoretical analysis and does not focus on a specific city. Aiming at the changes in agricultural product prices in Chengdu, this article first proposes hypotheses in terms of income effect, price expectation effect and cost effect, and then selects the prices of agricultural products around the Spring Festival in 2020 and uses Difference-in-Difference for analysis. The empirical results show that among different types of agricultural products, livestock and poultry rose the most, at 6.6%, and grain and oil rose the least, at 0.3%. From the perspective of residents' income and geographic area, the prices of agricultural products in Chengdu have risen overall, and the price fluctuations are greatest in areas with small agricultural production values. The research in this article is helpful to understand the agricultural product price adjustment mechanism under the impact of the epidemic, and provides decision-making reference for effective formulation of relevant policies to stabilize prices and ease the pressure on residents' lives.