Impact of “Cost Reduction Policy” on Enterprise Efficiency of Logistics Enterprises Based on PSM-DID in China

Due to the lack of a complete statistical data system based on the logistics industry in China, the growth of transportation, warehousing, and postal services has been the backbone of the logistics industry, accounting for a high proportion of its value growth. Given the availability of data, statistical data from the transportation, warehousing, and postal industries are used in this document instead of logistics companies for analysis. This study selected the annual data of Chinese A-share listed companies from 2017 to 2022 as the sample. All data comes from the CSMAR (China Stock Market and Accounting Research Database) database. The data screening is as follows: excluding companies with missing data; Excluding ST (special treatment R, companies that have suffered losses for two consecutive years) and * ST (companies that have suffered losses for three consecutive years); Excluding financial listed companies.