Browsing by Author "Chen, Tao"

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    Correlates of Gait Speed Among Older Adults From 6 Countries: Findings From the COSMIC Collaboration
    (Oxford University Press, 2023) Sprague, Briana N.; Zhu, Xiaonan; Rosso, Andrea L.; Verghese, Joe; Delbaere, Kim; Lipnicki, Darren M.; Sachdev, Perminder S.; Ng, Tze Pin; Gwee, Xinyi; Yap, Keng Bee; Kim, Ki-Woong; Han, Ji Won; Oh, Dae Jong; Narazaki, Kenji; Chen, Tao; Chen, Sanmei; Brodaty, Henry; Numbers, Katya; Kochan, Nicole A.; Walker, Richard W.; Paddick, Stella-Maria; Gureje, Oye; Ojagbemi, Akin; Bello, Toyin; Rosano, Caterina; COSMIC Consortium; Medicine, School of Medicine
    Background: Few studies have compared gait speed and its correlates among different ethnogeographic regions. The goals of this study were to describe usual and rapid gait speed, and identify their correlates across Australian, Asian, and African countries. Methods: We used data from 6 population-based cohorts of adults aged 65+ from 6 countries and 3 continents (N = 6 472), with samples ranging from 231 to 1 913. All cohorts are members of the Cohort Studies of Memory in an International Consortium collaboration. We investigated whether clinical (body mass index [BMI], hypertension, stroke, apolipoprotein status), psychological (cognition, mood, general health), and behavioral factors (smoking, drinking, physical activity) correlated with usual (N = 4 cohorts) and rapid gait speed (N = 3 cohorts) similarly across cohorts. Regression models were controlled for age, sex, and education, and were sex-stratified. Results: Age- and sex-standardized usual gait speed means ranged from 0.61 to 1.06 m/s and rapid gait speed means ranged from 1.16 to 1.64 m/s. Lower BMI and better cognitive function consistently correlated with faster gait speed in all cohorts. Less consistently, not having hypertension and greater physical activity engagement were associated with faster gait speed. Associations with mood, smoking, and drinking were largely nonsignificant. These patterns were not attenuated by demographics. There was limited evidence that the associations differed by sex, except physical activity, where the greater intensity was associated with usual gait among men but not women. Conclusions: This study is among the first to describe the usual and rapid gait speeds across older adults in Africa, Asia, and Australia.
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    Windfalls of Emperors’ Sojourns: Stock Market Reactions to Chinese Firms Hosting High Ranking Government Officials
    (Wiley, 2017-08) Schuler, Douglas A.; Shi, Wei; Hoskisson, Robert E.; Chen, Tao; Kelley School of Business - Indianapolis
    Research summary: We contribute to the corporate political activity (CPA) literature by showing that investors value companies that host visits of high-ranking government officials (President and Premier). We argue that investors may value host official visits for two reasons: (1) the signal received about possibility of firm accessing government-controlled resources via promotion or protection; and (2) the certification effect from such high-powered visitors elevating the firm's reputation and legitimacy. Results from an event study analysis of 84 high-ranking government official visits in China from 2003 to 2011 indicate that investors responded positively to host firms as reflected by stock market performance. Furthermore, the greatest positive reactions accrued to firms experiencing weaker prior period financial performance and to firms that are privately compared to state-controlled. Managerial summary: Do visits by high-ranking government officials influence firm stock market performance? Studying a sample of Chinese public firms that hosted 84 visits by the Chinese President and the Premier from 2003 to 2011, we find that investors reacted positively to such visits compared with a group of non-host firms from the same industry and with similar financial performance and size. In addition, firms with weaker prior financial performance and private firms benefit the most from hosting such visits. Our findings imply that hosting visits of high-ranking government officials can signal future government-controlled resource inflows and boost host firms' reputation and legitimacy.