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Träfflista för sökning "WFRF:(Johansson C.) ;mspu:(publicationother)"

Search: WFRF:(Johansson C.) > Other publication

  • Result 1-10 of 36
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  • Carlander, Johan, et al. (author)
  • Risk of nerve injury after use of energy based surgical devices
  • 2015
  • Other publication (other academic/artistic)abstract
    • BackgroundThe use of energy based surgical devices (EBD) is well established in surgery. Iatrogenic nerve injury is a common problem in many areas of surgery and may be caused by collateral thermal injury from EBD.MethodsThe sciatic nerve of anaesthetized rats was used in an experimental model. A bipolar scissors (ES) was compared to an ultrasonic device (UD) by cutting the femoris muscle longitudinal during 3 seconds at 1 mm from the sciatic nerve. Temperature and electromyography (EMG) were recorded before, during and after activation of the devices. The nerves were examined blinded with light (LM) and electronic microscope (EM).ResultsThe temperature increase was significantly less and with shorter duration after instrument activationfor the UD compared to bipolar ES. The EMG potential was reduced by 3 % in the UD group and 6% in the ES group respectively (n.s.). LM and EM demonstrated a loss of density in the myelin sheath in a small number of nerves in both groups.ConclusionThis study indicates less thermal spread in tissue following activation of the ultrasonic devices compared to bipolar ES. EMG and morphology assessment with LM and EM indicate a small risk and probably reversible thermal injury after clinical relevant instrument activation at 1 mm from the nerve.
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  • Feng, Xunan, et al. (author)
  • News or Noise? The Information Content of Social Media in China
  • 2019
  • Other publication (other academic/artistic)abstract
    • We examine the role top executives’ social media activity plays for the stock market. When analyzing a unique data set of board chairs’ posts on Chinese social media platform Sina Weibo, we find that they are positively associated with stock returns. When we take a closer look at content, we show it is work-related content that drives stock returns. Non-work-related content has an immediate but transitory effect, suggesting that such posts grab the attention of investors but only contain noise. We also find that information asymmetry plays a significant role in the relationship between board chairs’ Weibo posts and stock returns. Also, the more followers that board chairs have on their Weibo account, the larger the effect Weibo posts have on stock returns. Furthermore, relative to state-controlled firms, Weibo posts by board chairs in private firms exhibit a significantly larger effect on stock returns. Finally, we find that a laxer regulatory environment translates into board chairs’ work-related Weibo posts having a larger effect on stock returns. Top executive social media activity thus acts as a complementary channel for firm-specific information being disseminated to the stock market.
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  • Feng, Xunan, et al. (author)
  • Ownership, Analyst Coverage, and Stock Synchronicity in China
  • 2015
  • Other publication (other academic/artistic)abstract
    • This study examines how ownership structure affects the information environment of publicly traded firms in China. We hypothesize that concentrated ownership and the associated separation of ultimate control and ownership rights create agency conflicts between controlling shareholders and minority investors leading controlling owners to withhold firm-specific information from the market. We test this hypothesis by analyzing the effect of ultimate ownership structure and analyst coverage on stock return synchronicity. We find that a greater separation of control and ownership rights increases the response coefficient of stock return synchronicity to analyst coverage. This result is robust to endogeneity, a series of robustness checks, and an alternative hypothesis based on noise trading. The incentive of controlling owners to limit firm transparency thus leads analysts to disseminate more market-wide information.
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  • Result 1-10 of 36
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other publication  (36)Undo refine
Type of content
other academic/artistic (35)
pop. science, debate, etc. (1)
Author/Editor
Koltowska, Katarzyna (3)
Johansson, Anna C. V ... (3)
Forsman, M (2)
Johansson, A (2)
Johansson, E (2)
Johansson, C. (2)
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Persson, C (2)
Larsson, P (2)
Johansson, Börje (2)
Ahuja, Rajeev (2)
Österlund, Lars (2)
Moysés Araújo, C. (2)
Niklasson, Gunnar A. (2)
Lindgren, P (2)
Gloger, Marleen (2)
Giangiobbe, V. (1)
Johansson, P. (1)
Santoni, C. (1)
Jon-And, K. (1)
et al., (1)
Johansson, K (1)
Johansson, B (1)
Henein, Michael Y. (1)
Ahlinder, J. (1)
Bengtsson, Torbjörn, ... (1)
Larsson, E (1)
Johansson, M (1)
Fredlund, H (1)
Blomgren, J (1)
Larsson, C (1)
Johansson, Emil (1)
Zhu, Zhen (1)
Magnusson, A. (1)
Johansson, Gerd (1)
Edin, Alicia, 1985- (1)
Ibrahimi, Pranvera (1)
Bajraktari, Gani (1)
Neander, G (1)
Sjöstedt, Anders (1)
Koch, C. (1)
Wallergård, Mattias (1)
Eliasson, H. (1)
Belova, Lyubov (1)
Azar, Christian, 196 ... (1)
Johansson, Daniel, 1 ... (1)
Wiklund, U. (1)
Lönn, J (1)
Thelaus, J. (1)
Sjödin, A (1)
Elofsson, Mikael (1)
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University
Uppsala University (10)
Stockholm School of Economics (10)
Umeå University (7)
Linköping University (3)
Royal Institute of Technology (2)
Stockholm University (1)
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Örebro University (1)
Lund University (1)
Chalmers University of Technology (1)
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Language
English (33)
Undefined language (3)
Research subject (UKÄ/SCB)
Social Sciences (11)
Natural sciences (8)
Medical and Health Sciences (7)
Engineering and Technology (2)

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