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Abstract This study examines whether and how corporate digitalization affects labor investment practices. Using a sample of Chinese listed companies from 2007 to 2023, we find that corporate digital development is positively associated with labor investment efficiency. Mechanism tests show that corporate digitalization can facilitate precise judgment of labor input scales, accelerate employment adjustment responsiveness, recruit high-quality potential workforce, and improve management oversight, thus contributing to making efficient labor investment decisions. Cross-sectional tests indicate that the positive impact of corporate digital development is more prominent for firms located in regions with stronger labor protection systems, industries with higher competition levels and those non-state-owned enterprises. Moreover, corporate digitalization can curb both over- and underinvestment in labor resources, and this effect is primarily manifested in firm’s hiring practices. Our findings contribute to the literature on the determinants of corporate labor investment efficiency and provide practice insight into the role of corporate digitalization in firm’s decision-making.

This study aims to examine the variation in corrosion characteristics and tensile properties of WE43 magnesium alloy in an actual marine atmospheric environment by means of outdoor exposure tests. The macroscopic corrosion morphology, microstructure, and tensile properties were analyzed. The results indicated that WE43 alloy will corrode rapidly during exposure under marine atmospheric environmental conditions, resulting in a loose and porous Mg(OH)2 layer on the surface. The Mg matrix was mainly consumed as an anode, leading to the occurrence of corrosion pits. With the increase in exposure time, both the tensile strength and plasticity of WE43 alloy gradually deteriorated. After exposure for six months, the elongation and area reduction were significantly reduced, with a reduction ratio of more than 50%. After 18 months of exposure, the ultimate strength of the alloy decreased from 359 MPa to 300 MPa. According to an analysis of fractures in the alloy, the corrosion pits on the sample surface were the main reason for the decrease in tensile properties.