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Description
The theme for this work is the development of fast numerical algorithms for sparse optimization as well as their applications in medical imaging and source localization using sensor array processing. Due to the recently proposed theory of Compressive Sensing (CS), the $\ell_1$ minimization problem attracts more attention for its ability to exploit sparsity. Traditional interior point methods encounter difficulties in computation for solving the CS applications. In the first part of this work, a fast algorithm based on the augmented Lagrangian method for solving the large-scale TV-$\ell_1$ regularized inverse problem is proposed. Specifically, by taking advantage of the separable structure, the original problem can be approximated via the sum of a series of simple functions with closed form solutions. A preconditioner for solving the block Toeplitz with Toeplitz block (BTTB) linear system is proposed to accelerate the computation. An in-depth discussion on the rate of convergence and the optimal parameter selection criteria is given. Numerical experiments are used to test the performance and the robustness of the proposed algorithm to a wide range of parameter values. Applications of the algorithm in magnetic resonance (MR) imaging and a comparison with other existing methods are included. The second part of this work is the application of the TV-$\ell_1$ model in source localization using sensor arrays. The array output is reformulated into a sparse waveform via an over-complete basis and study the $\ell_p$-norm properties in detecting the sparsity. An algorithm is proposed for minimizing a non-convex problem. According to the results of numerical experiments, the proposed algorithm with the aid of the $\ell_p$-norm can resolve closely distributed sources with higher accuracy than other existing methods.
ContributorsShen, Wei (Author) / Mittlemann, Hans D (Thesis advisor) / Renaut, Rosemary A. (Committee member) / Jackiewicz, Zdzislaw (Committee member) / Gelb, Anne (Committee member) / Ringhofer, Christian (Committee member) / Arizona State University (Publisher)
Created2011
Description
Entrepreneurship entails a transition from status quo to a founder/leader of a new organization, and the dominant view in the literature focuses on opportunities in a hypothetical situation, namely an entrepreneurial option. This study shifts the attention from an entrepreneurial option to a current situation and proposes that a perception of costliness in status quo as a driver of entrepreneurial decisions and strategies. Specifically, I propose that a perception of inequality due to the local hierarchy of an organization engenders motivation of disadvantaged employees to become a leader of his/her own entrepreneurial organization. Utilizing hierarchy-based power dynamics and attribution biases, I theorize that i) status gap between a leader and a member and ii) status distinctiveness of a leader in the current organization affect an entrepreneurial decision because of inequality perception. Furthermore, I hypothesize that entrepreneurial organizations driven by such status inequality are more likely to replicate the local structure of the previous employer in terms of status hierarchy to compensate for the perceived disadvantages in the previous employer. The empirical analyses of this study investigate entrepreneurial decisions and entrepreneurial team formation of jazz musicians from jazz discographies between 1950 and 2018, and I found supportive results. This study contributes to the entrepreneurship and inequality literature by bridging two research spaces. It first uncovers the roles of a negative perception of the status quo in entrepreneurship, in addition to the established idea of a positive perception of an alternative option. It also suggests a novel explanation of the long-standing question of inequality reproduction by looking at whether and how inequality spreads via entrepreneurship.
ContributorsJeon, Chunhu (Author) / Shen, Wei (Thesis advisor) / Bundy, Jonathan N (Thesis advisor) / Certo, S. Trevis (Committee member) / Arizona State University (Publisher)
Created2022
Description
This article first reviews the development process and research status of ESG, pointing out that there has been less attention paid to the impact of executive teams on corporate ESG performance in existing studies, while studying the impact of executive team background on corporate ESG performance has important theoretical and practical significance. This article starts from two aspects: the overseas background and academic background of the executive team, and uses empirical research methods to examine the impact of the background characteristics of the executive team on the ESG performance of enterprises.This study found that firstly, the larger the proportion of executive members with overseas backgrounds, the better the ESG performance of a company. The research results indicate that overseas experience and experience can influence executive behavior and make decisions that are beneficial for the ESG performance of the company. Secondly, the larger the proportion of executive members with academic backgrounds, the better the ESG performance of the enterprise. The research results indicate that the academic background of the executive team can significantly improve their learning and information collection abilities, thereby making them more proficient in ESG related decision-making, and thus having a positive promoting effect on the ESG performance of the enterprise. Heterogeneity analysis shows that the impact of overseas and academic backgrounds of executive teams on ESG performance is more pronounced in state-
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owned enterprises, when the external legal environment of the enterprise is more perfect, and when the proportion of executive shareholding is higher.
Further research has found that the overseas background of the board of directors also has a positive impact on the ESG performance of enterprises. In addition, this study found that the improvement of ESG performance by the overseas background of the executive team is mainly reflected in the two dimensions of ESG society and governance, while the improvement of ESG performance by the academic background of the executive team is mainly reflected in the two dimensions of ESG environment and society.
This article starts with the latest business philosophy of enterprise ESG performance, examining the impact of executive team background characteristics on enterprise ESG performance, enriching research on the economic consequences of executive team background characteristics, and expanding research on the influencing factors of enterprise ESG performance. The research conclusions of this article contribute to a deeper understanding and understanding of the scenarios in which background characteristics of executive teams may play a role, and also contribute to a deeper analysis of the possible influencing factors of ESG performance in enterprises. The research conclusions of this article have certain practical guiding significance for the construction of ESG system and the formation of executive teams in Chinese listed companies.
ContributorsHe, Jing (Author) / Zhu, David (Thesis advisor) / Cheng, Shijun (Thesis advisor) / Pei, Buck (Committee member) / Arizona State University (Publisher)
Created2023
Description
This paper first introduces the institutional background of the study. In the context of the transition from the approval system to the registration system in China, the gatekeeper role of IPO enterprises has changed from the supervisor to the market, which puts forward higher requirements for intermediary institutions such as securities companies. As an important market medium connecting IPO enterprises and external investors, securities companies are known as the "gatekeepers" of the capital market. They can authenticate and supervise the IPO enterprises they underwrite and/or sponsor. The impact of securities companies on the IPO process has also been a hot topic in the academic and practical circles. This paper examines the impact of internal control of securities companies on IPO companies.This study finds that the higher the level of internal control of securities companies, the higher the quality of IPO companies, including higher IPO information disclosure quality, lower IPO underpricing and higher post IPO performance. The mechanism test indicates that the internal control of securities companies can reduce employees' self-interest behavior and improving employees' work efficiency. Secondly, the impact is stronger in non-state-owned enterprises, when the reputation of securities companies is lower, and the external legal environment is lower. In addition, this study finds the compliance degree of internal control and the reliability of reporting of securities firms are important dimensions that affect the quality of IPO enterprises.
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The conclusions of this study have some practical significance. First, this study finds that the level of internal control of securities firms has an important impact on the quality of IPO enterprises. Therefore, improving the internal control of China's securities companies is an important work that needs to be grasped for a long time. The research conclusions of this paper have important research significance for further optimizing the gatekeeper responsibilities of securities companies and improving the efficiency of resource allocation in the IPO market under the background of the transition from the approval system to the registration system in China's IPO market.
ContributorsZhang, Hongzhe (Author) / Zhu, David (Thesis advisor) / Zhang, Anmin (Thesis advisor) / Wang, Yimin (Committee member) / Arizona State University (Publisher)
Created2023
Description
The pharmaceutical industry is closely related to the national economy and people's livelihood, with high drug prices and pressure on health insurance. The implementation of the band purchasing policy has made an important contribution to lowering drug prices, improving the balance rate of health insurance, reshaping the pattern of the pharmaceutical industry, and improving the efficiency of pharmaceutical production and circulation, but how the band purchasing policy affects the performance of the majority of pharmaceutical enterprises, and how the pharmaceutical enterprises can effectively deal with the challenges of environmental mutation and other related problems have not yet been effectively explored.To this end, this paper collects data from A-share listed pharmaceutical companies in China from 2014 to 2022, takes 2018 as the base year for the implementation of the "4+7" "band purchasing" policy, and utilizes a multi-period DID double-difference model for hypothesis verification. It is found that the implementation of the band purchasing policy significantly reduces the profitability performance and growth performance of pharmaceutical enterprises. Secondly, the implementation of enhanced innovation can moderate the negative impact of band purchasing on the growth performance of enterprises, and the expansion of exports and the enhancement of digitalization can significantly
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improve the negative impact of band purchasing on the profitability performance of enterprises, but has no effect on the growth performance of enterprises. In addition, this paper analyzes the process of pharmaceutical enterprises' implementation of enhancing innovation, expanding exports, and improving digitalization through case studies, and refines the strategic change process model of "coping strategy formation - coping strategy implementation - adaptation to the new state" under the sudden change environment. This paper explores the differentiated effects of coping strategies of different types of pharmaceutical enterprises in the face of the band purchasing policy, and provides some insights into the practice of related enterprises.
ContributorsBao, Sheng (Author) / Zhu, David (Thesis advisor) / Chen, Xin (Thesis advisor) / Dong, Xiaodan (Committee member) / Arizona State University (Publisher)
Created2023
Description
This paper analyzes China's transformative changes over the past four decades through a microeconomic lens focused on enterprises. Market-oriented non-state-owned enterprises have emerged as a pivotal force driving China's economic development within this context. The article investigates the determinants of their development. Notably, more than half of market-oriented non-state-owned enterprises have entered the inheritance stage, necessitating the exploration of novel attributes for sustained growth.The study's research scope is defined across four dimensions, with a specific focus on approximately 4,000 market-oriented non-state-owned enterprises. It investigates the driving factors behind sustained performance growth at various stages of these enterprises, emphasizing five variables: "partnership governance, entrepreneurial spirit, development strategy, incentive mechanisms, and innovation capability." Employing a combination of "typical case studies" and "group validation" methods, the research examines the factors influencing sustained growth in these enterprises and their interrelationships. The goal is to construct a model for enterprise succession and development, ultimately offering recommendations to foster sustained growth.
The research paper is structured into an introduction, literature review and theoretical foundation, typical case studies, empirical research on a group, and a conclusion.
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Key findings include: Partnership governance positively impacts partners' entrepreneurial spirit, promoting sustained performance growth. Trajectory-oriented development strategies, effective incentive mechanisms, and leading innovation capabilities have a positive moderating effect on entrepreneurial spirit, fostering sustained performance growth. During the innovation development phase, partnership governance significantly influences entrepreneurial spirit with a noteworthy environmental moderation effect.
The paper recommends implementing a "Dual-Factor Improvement Model" that enhances both partnership governance systems and the selection and functioning mechanisms of entrepreneurial spirit partners. This approach aims to boost partners' entrepreneurial spirit and facilitate high-quality succession in market-oriented non-state-owned enterprises，，ultimately achieving sustained high-quality growth.
In conclusion, this research contributes to a deeper understanding of sustained performance growth in enterprises. It offers valuable insights for the succession and development of market-oriented non-state-owned enterprises and innovation-driven entrepreneurship. This research holds significant value in advancing sustained high-quality development among market-oriented non-state-owned enterprises in China, optimizing resource allocation, and nurturing talented individuals.
ContributorsDeng, Cheng (Author) / Shen, Wei (Thesis advisor) / Cheng, Shijun (Thesis advisor) / Wu, Fei (Committee member) / Arizona State University (Publisher)
Created2023
Description
The pharmaceutical industry plays an important role in Chinese economic development. How to propel the innovation and growth of the pharmaceutical industry with capital market tools becomes an important question. With the increasing layout of venture capital (VC) in the pharmaceutical industry, the impact of VC participation on the innovation and growth of pharmaceutical enterprises should be carefully studied. For investment purposes, CVCs, which are established by industrial corporations, mainly focus on new technologies and modes in the relevant industrial chain of their parent companies, and try to establish strategic synergy through their equity investment. IVCs have no specific industry restrictions, and their purpose is to search for and identify innovative enterprises with high growth potentials, and to harvest financial gains by investing in them.In order to explore these issues, this paper collects and analyzes data from a sample of Chinese A-share listed pharmaceutical companies from 2015 to 2022, tests the impact of VCs on the innovation inputs, innovation outputs, and growth performance of this sample of companies, and examines the differences between the impacts of IVCs and CVCs on the relevant performance. It is found that VC investment has a significant positive impact on pharmaceutical firms' innovation input, innovation output, and firm growth. In particular, IVCs have a significant positive effect on innovation input, growth performance, and an insignificant effect on innovation output of pharmaceutical firms.
CVCs, on the other hand, have a significant positive effect on innovation input, innovation output, and growth performance of pharmaceutical firms. In addition, the interaction between IVC and CVC can further enhance the innovation input level and growth performance level of pharmaceutical enterprises.
This paper uncovers the differences in the impact of IVCs and CVCs on the innovation input, innovation output, and growth performance of pharmaceutical enterprises, expands the research on venture capital, enriches the driving mechanism of pharmaceutical enterprises' high-quality growth and innovation capability in the Chinese context. This paper also provides some insights into how pharmaceutical enterprises select VCs and how VCs can empower pharmaceutical enterprises in practice.
ContributorsZhang, Pei (Author) / Zhu, David (Thesis advisor) / Yan, Hong (Thesis advisor) / Wu, Fei (Committee member) / Arizona State University (Publisher)
Created2023
Description
With the increasing aging population in China, the public's emphasis on health has been on the rise. Many innovative pharmaceutical companies have undertaken multiple rounds of financing, with some going public through IPOs. As a high-tech industry, it is essential to study the relationship between the level of corporate publicity and the financing process.This study collected information on the number of promotional articles, timing, and platforms of dozens of pharmaceutical companies that have already gone public through IPOs using Python. An analysis was conducted on the temporal variations of promotional articles for ten representative companies. It was found that the number of promotional articles experienced a significant increase in the month of IPO or the month before, and remained relatively high even after the IPO.
Furthermore, the Pearson correlation coefficient method was used to analyze the correlation between the number of promotional articles and various stages of financing. The study found a positive correlation between the daily average number of promotional articles before IPO and the final financing amount. Additionally, a strong positive correlation was observed between the daily average number of promotional articles from 7 days before IPO to IPO day and the turnover rate on IPO day. Grey correlation analysis was also employed to analyze the impact of publicity on the financing amount of each
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financing round, revealing that the financing round and the Shanghai Composite Index had a significant influence.
Finally, a multiple regression analysis was conducted to examine the relationship between the pre-IPO financing scale, IPO-day trading amount, and the level of corporate publicity. The regression results indicated that the pre-IPO financing scale was mainly influenced by the number of promotional articles in the 7 days preceding IPO, particularly for pharmaceutical companies listed on the A-share market. Moreover, a negative correlation was observed between the financing round and the financing amount, particularly among companies that experienced a decline in share price on the IPO day. However, the study found a weak association between the IPO-day trading amount and the level of corporate publicity, primarily observed among pharmaceutical companies listed on the A-share market.
ContributorsMiao, Yujia (Author) / Shen, Wei (Thesis advisor) / Jiang, Zhan (Thesis advisor) / Cheng, Shijun (Committee member) / Arizona State University (Publisher)
Created2024
Description
Solar power, as an important part of renewable energy, has become one of the main choices for countries around the world in their energy strategic layout due to its cleanliness, renewability, and distributed attributes. In the context of the booming photovoltaic industry, China has emerged a large number of excellent photovoltaic companies, driving the whole industry to reduce costs and increase efficiency, making many contributions to the grid parity of photovoltaic power generation. In the development lifecycle of the photovoltaic industry, various companies choose different competitive strategies to deal with industry cyclical changes and external uncertainty based on their core competitiveness and market opportunities. Vertical integration is one of the strategic paths chosen by many photovoltaic companies. Therefore, it is an important issue to explore the impact of vertical integration on the development of Chinese photovoltaic companies.Based on the data of China's A-share listed photovoltaic companies from 2018 to 2022, this paper uses panel fixed effect model to empirically test the impact of vertical integration on corporate valuation, explores its influencing mechanism, and further analyzes the moderating effect of enterprise heterogeneity factors. The research in this paper shows that: (1) under other conditions unchanged, vertical integration significantly improves the valuation level of enterprises, and this positive impact will not change with the measurement method of enterprise valuation level. This is because the higher the vertical integration degree of enterprises, the stronger their ability to respond to external uncertainty. The more enterprises can obtain capital market preferences, the higher the enterprise valuation will be. This also means that the higher the vertical integration degree of photovoltaic enterprises, the higher their market share is, and they are more able to avoid the impact of external uncertainty, thus obtaining a higher valuation level in the secondary market. (2) The intermediary effect test shows that the channel for vertical integration of photovoltaic enterprises to affect enterprise valuation levels is to increase their market share. (3) Further heterogeneity analysis shows that enterprise profitability and enterprise size positively regulate the impact of vertical integration on enterprise valuation, while enterprise management shareholding ratio and enterprise operating cost ratio will weaken the positive promotion effect of vertical integration.
The research conclusions of this paper provide micro-empirical evidence for how photovoltaic companies can improve their enterprise valuation, and also provide some management references for other unlisted companies in the same industry.
Keywords: Photovoltaic enterprises; Vertical integration; Corporate valuation; Fixed effect model
ContributorsZheng, Ren (Author) / Shen, Wei (Thesis advisor) / Wu, Fei (Thesis advisor) / Zhao, Yanfei (Committee member) / Arizona State University (Publisher)
Created2024
Description
In recent years, with the increasing awareness of sustainable development, the ESG performance of enterprises has gradually attracted extensive attention from investors, and has a continuous impact on the long-term stable operation of enterprises. In the new stage of development, whether ESG performance can reduce the cost of corporate debt financing deserves further study. This paper takes domestic A-share listed non-financial companies with ESG ratings from 2011 to 2021 as samples to empirically study the impact of domestic corporate ESG performance on corporate debt financing costs. The empirical results show that: First, the improvement of ESG performance can effectively reduce the cost of corporate debt financing. Second, the moderating variable analysis shows that corporate transparency, CEO's academic background, and whether the company is in a recession period all have a positive moderating effect on the negative relationship between ESG performance and debt financing costs. However, the moderating effect of internal control and CEO's overseas study background on the relationship between ESG performance and debt financing cost is not significant. The innovation of this paper is that CEO characteristics (whether the CEO has overseas study background and academic background) are innovatively introduced as moderating variables, and further analysis is carried out to further analyze whether CEO characteristics play a moderating role in the relationship between ESG and debt financing costs.Key words: ESG, Corporate Debt Financing Costs, Internal Control , Corporate Transparency , CEO Characteristics
ContributorsAi, Qing (Author) / Zhu, David (Thesis advisor) / Chiu, Tzu-Kuan (Thesis advisor) / Liu, Peng (Committee member) / Arizona State University (Publisher)
Created2024