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Sökning: (WFRF:(Jiahe Zhang)) > (2022)

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1.
  • Liu, Weihua, et al. (författare)
  • Effects of smart agricultural production investment announcements on shareholder value : Evidence from China
  • 2022
  • Ingår i: Journal of Management Science and Engineering. - China : KeAi Publishing Communications Ltd.. - 2096-2320. ; 7:3, s. 387-404
  • Tidskriftsartikel (refereegranskat)abstract
    • The advent of the era of the smart economy has made agricultural production more intelligent. An increasing number of companies have launched a series of investment activities aimed at smart agricultural production (SAP). However, whether smart agricultural production investment (SAPI) impacts the stock market has yet to be confirmed. Therefore, based on the sample data of 118 listed companies in China from 2010 to 2019, this study empirically examines the impact of SAPI announcements on shareholder value, as indicated by abnormal returns of stocks. Further, we tested the moderating effect of certain characteristic factors on abnormal stock returns. The research results illustrate a significant positive connection between SAPI announcements and shareholder value. Moreover, considering the announcement content and company factors, this study investigates the impacts of different investment targets and industries on the market reaction to SAPI announcements. We find that non-agricultural companies have a more positive market reaction to SAPI than agricultural companies; the higher the liability-asset ratio, the more positive will be the stock market reaction to SAPI.
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2.
  • Santangelo, James S., et al. (författare)
  • Global urban environmental change drives adaptation in white clover
  • 2022
  • Ingår i: Science. - : American Association for the Advancement of Science (AAAS). - 0036-8075 .- 1095-9203. ; 375
  • Tidskriftsartikel (refereegranskat)abstract
    • Urbanization transforms environments in ways that alter biological evolution. We examined whether urban environmental change drives parallel evolution by sampling 110,019 white clover plants from 6169 populations in 160 cities globally. Plants were assayed for a Mendelian antiherbivore defense that also affects tolerance to abiotic stressors. Urban-rural gradients were associated with the evolution of clines in defense in 47% of cities throughout the world. Variation in the strength of clines was explained by environmental changes in drought stress and vegetation cover that varied among cities. Sequencing 2074 genomes from 26 cities revealed that the evolution of urban-rural dines was best explained by adaptive evolution, but the degree of parallel adaptation varied among cities. Our results demonstrate that urbanization leads to adaptation at a global scale.
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