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Visar resultat 1 - 5 av 89 avhandlingar som matchar ovanstående sökkriterier.

  1. 1. Adaptive blind deconvolution using third-order moments : exploiting asymmetry

    Författare :Patrik Pääjärvi; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Signalbehandling; Signal Processing;

    Sammanfattning : This thesis focuses on the use of third-order statistics in adaptive blind deconvolution of asymmetric impulsive signals. Traditional methods are typically based on fourthorder moments, which can discriminate signals with heavy-tailed probability functions (i.e. `spiky' signals) from corresponding filtered versions. LÄS MER

  3. 2. Enterprise Social Media in Project-based Knowledge Work : A contextualized view through the lens of activity theory

    Författare :Emma Forsgren; Pam McKenzie; Högskolan i Borås; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; enterprise social media; information sharing; activity theory; case study; Library and Information Science; Biblioteks- och informationsvetenskap;

    Sammanfattning : Project-based knowledge work is characterised by decentralised and dynamic team-based structures, different from the tradi­tional, bureaucratic organisation. Arguably, this flexible and collaborative work setting could benefit from enterprise social media, which helps facilitate how people connect, collaborate and share information across organisational boundaries. LÄS MER

  4. 3. Essays on Information and Conflicts of Interest in Stock Recommendations

    Författare :Erik Lidén; Göteborgs universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Stock recommendations; Printed media; Price-pressure hypothesis; Information hypothesis; Journalists; Analysts; EMH; Initiations; Information asymmetry; Initial public offerings; Quiet period; Underwriter analysts.;

    Sammanfattning : This thesis brings together three separate empirical essays on the information and conflicts of interest in stock recommendations. The first essay analyzes stock-price reactions to recommendations published in printed Swedish media and also trading volumes at and around the publication day, bid/ask spreads, and the post-publication drift in recommended stocks for the period 1995-2000. LÄS MER

  5. 4. Demand and Supply of Information on Intangibles: The Case of Knowledge-Intense Companies

    Författare :Susanne Arvidsson; Företagsekonomiska institutionen; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; ekonomisk politik; ekonomiska system; ekonomisk teori; ekonometri; Nationalekonomi; economic policy; economic systems; economic theory; econometrics; Economics; Knowledge-Intense Companies; Value-Creation Process; Information Flow; Agency Problems; Intangibles; Information Asymmetry;

    Sammanfattning : This doctoral thesis has its theoretical origin in the notion that the information flow between management teams, financial analysts and investors is especially exposed to information asymmetry when knowledge-intense companies are concerned. Information asymmetry may aggravate agency problems and risk causing an impairment of the efficient allocation of capital on the stock market. LÄS MER

  7. 5. Essays on information asymmetry, disclosures and the financing of R&D. The case of the biotechnology industry

    Författare :Hans Jeppsson; Göteborgs universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; biotechnology; ; information asymmetry; disclosures; value-relevance; equity market timing; mispricing; adverse selection; monitoring; seasoned equity offerings; rights offerings; private placements; ; alliance;

    Sammanfattning : Investments in research and development (R&D) are an important driver of innovation, productivity and economic growth. Despite the importance of R&D investments to society, it is commonly known that R&D activities are difficult to finance in a competitive marketplace. LÄS MER