Culda Lia

Culda Lia

orcid

Research Focus & Metrics

Academic Career Length

4Years (2023-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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30 November 2023 in Mathematics
Verified
Journal Article
Open access
PDF file
Marian Pompiliu I CristescuMarian Pompiliu I Cristescu
Marian Pompiliu I Cristescu
Dumitru Alexandru MaraDumitru Alexandru Mara
Dumitru Alexandru Mara
Raluca Andreea NerișanuRaluca Andreea Nerișanu
Raluca Andreea Nerișanu
CLCulda Lia
Culda Lia
IMIonela Maniu
Ionela Maniu
This study investigates the complex interplay between public sentiment, as captured through news titles and descriptions, and the stock prices of three major tech companies: Microsoft (MSFT), Tesla (TSLA), and Apple (AAPL). Leveraging advanced analytical methods including Pearson correlation, wavelet coherence, and regression analysis, this research probes the degree to which stock-price fluctuations can be attributed to the polarity of media sentiment. The methodology combines statistical techniques to assess sentiment’s predictive power for stock opening and closing prices, while wavelet coherence analysis unveils the temporal dynamics of these relationships. The results demonstrate a significant correlation between sentiment polarity and stock prices, with description polarity affecting Microsoft’s opening prices, title polarity influencing Tesla’s opening prices, and a positive impact of title polarity on Apple’s closing prices. However, Tesla’s stock showed no significant coherence, indicating a potential divergence in how sentiment affects stock behavior across companies. The study highlights the importance of sentiment analysis in forecasting stock-market trends, revealing not only direct correlations but also lagged influences on stock prices. Despite its focus on large-cap tech firms, this research provides a foundational understanding of sentiment’s financial implications, suggesting further investigation into smaller firms and other market sectors.

19 October 2023 in Information
Verified
Journal Article
Open access
PDF file
Marian Pompiliu I CristescuMarian Pompiliu I Cristescu
Marian Pompiliu I Cristescu
Dumitru Alexandru MaraDumitru Alexandru Mara
Dumitru Alexandru Mara
CLCulda Lia
Culda Lia
Raluca Andreea NerișanuRaluca Andreea Nerișanu
Raluca Andreea Nerișanu
Adela BaraAdela Bara
Adela Bara
Simona OpreaSimona Oprea
Simona Oprea
This study explores the potential of data science software solutions like Customer Relationship Management Software (CRM) for increasing the revenue generation of businesses. We focused on those businesses in the accommodation and food service sector across the European Union (EU). The investigation is contextualized within the rising trend of data-driven decision-making, examining the potential correlation between data science applications and business revenues. By employing a comprehensive evaluation of Eurostat datasets from 2014 to 2021, we used both univariate and multivariate analyses, assessing the percentage of companies that have e-commerce sales across the EU countries, focusing on the usage of big data analytics from any source and the use of CRM tools for marketing purposes or other activities. Big data utilization showed a clear, positive relationship with enhanced e-commerce sales. However, CRM tools exhibited a dualistic impact: while their use in marketing showed no significant effect on sales, their application in non-marketing functions had negative effects on sales. These findings underscore the potential role of CRM and data science solutions in enhancing business performance in the EU’s accommodation and food service industry.

1 November 2023 in Preprints.org
Verified
Preprint
Open access
PDF file
Marian Pompiliu I CristescuMarian Pompiliu I Cristescu
Marian Pompiliu I Cristescu
Dumitru Alexandru MaraDumitru Alexandru Mara
Dumitru Alexandru Mara
Raluca Andreea NerișanuRaluca Andreea Nerișanu
Raluca Andreea Nerișanu
CLCulda Lia
Culda Lia
IMIonela Maniu
Ionela Maniu
This study investigates the complex interplay between public sentiment, as captured through news titles and descriptions, and the stock prices of three major tech companies: Microsoft (MSFT), Tesla (TSLA), and Apple (AAPL). Leveraging advanced analytical methods including Pearson correlation, wavelet coherence, and regression analysis, this research probes the degree to which stock price fluctuations can be attributed to the polarity of media sentiment. The methodology combines statistical techniques to assess sentiment's predictive power on stock opening and closing prices, while wavelet coherence analysis unveils the temporal dynamics of these relationships. Results demonstrate a significant correlation between sentiment polarity and stock prices, with description polarity affecting Microsoft's opening prices, title polarity influencing Tesla's opening prices, and a positive impact of title polarity on Apple's closing prices. However, Tesla's stock showed no significant coherence, indicating a potential divergence in how sentiment affects stock behavior across companies. The study highlights the importance of sentiment analysis in forecasting stock market trends, revealing not only direct correlations but also lagged influences on stock prices. Despite its focus on large-cap tech firms, this research provides a foundational understanding of sentiment's financial implications, suggesting further investigation into smaller firms and other market sectors.


8 September 2023 in Preprints.org
Verified
Preprint
Open access
PDF file
Marian Pompiliu I CristescuMarian Pompiliu I Cristescu
Marian Pompiliu I Cristescu
Dumitru Alexandru MaraDumitru Alexandru Mara
Dumitru Alexandru Mara
CLCulda Lia
Culda Lia
Raluca Andreea NerișanuRaluca Andreea Nerișanu
Raluca Andreea Nerișanu
Adela BaraAdela Bara
Adela Bara
Simona OpreaSimona Oprea
Simona Oprea
This study explores the potential of data science software solutions like Customer Relationship Management Software (CRM) for increasing the revenue generation of businesses. We focused on those businesses in Accommodation and Food Service sector across the European Union (EU). The investigation is contextualized within the rising trend of data-driven decision making, examining the potential correlation between data science application and business revenue. Employing a comprehensive evaluation of Eurostat datasets from 2014 to 2021, we used both univariate and multivariate analyses, we assessed e-commerce sales data across countries, focusing on the usage of big data and CRM tools. Big data utilization showed a clear, positive relationship with enhanced e-commerce sales. However, CRM tools exhibited a dualistic impact: while their use in marketing showed no significant effect on sales, their application in non-marketing functions had a negative correlation. These findings underscore the potential role of CRM and data science solutions in enhancing business performance in the EU's Accommodation and Food Service industry.

1 April 2026
Verified
Book Chapter
Closed access
Marian Pompiliu I CristescuMarian Pompiliu I Cristescu
Marian Pompiliu I Cristescu
CLCulda Lia
Culda Lia
Raluca Andreea NerișanuRaluca Andreea Nerișanu
Raluca Andreea Nerișanu
Dumitru Alexandru MaraDumitru Alexandru Mara
Dumitru Alexandru Mara
ACAna Maria Constantinescu
Ana Maria Constantinescu