Listar por autoría "a7e8915e-e08c-4917-82fc-5b3dcaf6e374"

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    • closedAccess   Daily happiness and stock returns: Some international evidence 

      Zhang, Wei; Li, Xiao; Shen, Dehua; Teglio, Andrea Elsevier (2016-10-15)
      In this paper, we examine the relations between the daily happiness sentiment extracted from Twitter and the stock market performance in 11 international stock markets. By partitioning this happiness sentiment into quintiles ...

    • openAccess   Electron injection and scaffold effects in perovskite solar cells 

      Anaya, Miguel; Zhang, Wei; Clasen Hames, Bruno; Li, Yuelong; Fabregat-Santiago, Francisco; Calvo, Mauricio E.; Snaith, Henry J.; Míguez, Hernán; Mora-Sero, Ivan Royal Society of Chemistry (2016-12)
      In spite of the impressive efficiencies reported for perovskite solar cells (PSCs), key aspects of their working principles, such as electron injection at the contacts or the suitability of the utilization of a specific ...

    • closedAccess   R2 and idiosyncratic volatility: Which captures the firm-specific return variation? 

      Zhang, Wei; Li, Xiao; Shen, Dehua; Teglio, Andrea Elsevier (2016)
      A growing literature regards R2 and idiosyncratic volatility as interchangeable proxies for firm-specific return variation and examines its relations to information efficiency. However, the question on choosing the ...