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Effects on Stock Prices of Companies Involved in Leaks of Offshore Documents
Odvárková, Zuzana ; Palanský, Miroslav (advisor) ; Secchini, Valeria (referee)
This thesis studies the effect of leaks of secret offshore documents on the value of the implicated firms. Using the entirety of International Consortium of Investigative Journalists' (ICIJ) Off- shore Leak Database, we identify 206 publicly traded firms connected to the implicated offshore firms. Then, we use propensity score matching to obtain a sample of similar non-implicated companies. Finally, the leak's impact on the stock price of both groups is studied using event study methodology. We find implicated firms to have 1.5% lower cumulative abnormal returns during the event window than similar non-implicated firms. Moreover, we provide an updated figure of 105 Million USD of average lost value per firm caused by the leak.
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The impact of technology in the classroom on academic performance
Vantuchová, Kristína ; Votápková, Jana (advisor) ; Secchini, Valeria (referee)
Technology plays an important role in our lives and we cannot ignore it in the education process either. Equipment often varies among schools, complicating the issue of fairness. This bachelor thesis is trying to investi- gate the impact of technology subsidies in education in Slovakia after the year 2015. For the econometric analysis we use publicly available data pro- vided by TIMSS (Trends in International Mathematics and Science Study) from 2019. TIMSS 2019 was administered to fourth-graders in 64 countries investigating their mathematics and science achievement and collecting con- textual questionnaires completed by students, their parents, teachers, and school principals. First, we use Difference-in-Differences method to estimate the impact of the policy on learning outcomes. We use the Czech Republic as a control group to estimate the effect of subsidies in Slovakia. According to the results of this model, subsidies caused a slight increase in the achieved score. We then apply the Ordinary Least Squares (OLS) method to assess impact of multiple variables related to the technology. The results vary across different variables. Keywords: education, difference-in-differences, TIMSS, technology, subsi- dies, Slovak republic, Czech Republic Author's email: 32485540@fsv.cuni.cz Supervisor's email:...
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