Measuring CEO Talent and Its Impact on Firm Performance: A Theoretical Integration and Empirical Analysis

This paper analyzes whether CEOs who are good contrarian investors, good forecasters, or good market timers can run their firms better. Besides using the timing measure which combines returns before and after the trade, we also use the past return measure to estimate the contrarian aspect of CEO trades and the future return measure to assess CEO’s ability to forecast stock returns. Our results suggest that CEOs’ managerial talent and valuation ability are primarily related to CEOs’ past return measure, while high post-trade returns indicate the expropriation motive for CEO trades. Overall, we obtain strong evidence to support the idea that CEOs who are good contrarian investors tend to run their firms better on average than other CEOs

Wearable Electromechanical Sensors and Its Applications

Wearable electromechanical sensor transforms mechanical stimulus into electrical signals. The main electromechanical sensors we focus on are strain and pressure sensors, which correspond to two main mechanical stimuli. According to their mechanisms, resistive and capacitive sensor attracts more attentions due to their simple structures, mechanisms, preparation method, and low cost. Various kinds of nanomaterials have been developed to fabricate them, including carbon nanomaterials, metallic, and conductive polymers. They have great potentials on health monitoring, human motion monitoring, speech recognition, and related human-machine interface applications. Here, we discuss their sensing mechanisms and fabrication methods and introduce recent progress on their performances and applications

The Use of 5G Network Technology to Reform and Innovate the Culture of Opening Ceremony in Chinese Winter Olympics

The application of 5G network technology in the opening ceremony of the Winter Olympic Games has changed the form of cultural display and made form change and innovation a research hotspot. The original cultural display method cannot meet the requirements of change and innovation, and the innovation effect after the change is poor. To this end, this paper proposes a reform and innovation model based on 5G network technology to improve the form of cultural display. First, wireless self- organization and sensors are used to obtain data in the form of cultural display, and data transformation is carried out through 5G network technology, and the form is changed according to the characteristics of cultural data, and irrelevant change content is abandoned. Then, according to the ultra-wide communication technology, the change rate and display effect of the special effect are analyzed, and compared with the actual reception effect, the parameters and indicators of the cultural display form are adjusted. The innovative design results show that under the condition of 5G network transmission, the transformation and innovation mode can improve the realization effect of cultural display, and the improvement rate is greater than the actual design requirements, which can meet the needs of innovative design