Abstract In March 2020, six European countries imposed temporary short-selling bans to
prevent further stock price declines, to reduce volatility, and to ensure financial stability …

Insiders are subjected to trading bans or close periods before earnings announcements.
Directors with multiple board seats can still trade in their other firms not subject to close …

We examine how competition to trade on information with institutional traders affects insider
trading. We find insiders complete their trades quicker when trading on the same side as …

We investigate a market with a normal-speed informed trader (IT) who may employ mixed
strategy and multiple anticipatory high-frequency traders (HFTs) who are under different …

The dissertation consists of two essays on XBRL adoption and its impact on market
participants. Compared to traditional reporting format, XBRL reporting format can potentially …

This thesis examines the effects of two disclosure-related regulations on the US capital
market: eXtensible Business Reporting Language (XBRL), which aims to reduce information …

Uzasadnienie teoretyczne: Od czasu przedstawienia pracy Famy o efektywności rynku
naukowcy badają wszelkie anomalie, które zakłócają tę efektywność. Wykorzystanie …

This study investigates the credibility of conflicting trading signals from two well‐informed
and sophisticated parties: corporate insiders and short sellers. Our results suggest that …

Abstract Theoretical background: Since presenting Fama's research on market efficiency,
scientists have been investigating any anomalies that interfere with market efficiency. The …

Diese Dissertation wäre nicht möglich gewesen ohne die tatkräftige Unterstützung von
wichtigen, mir nahestehenden Personen. Mein größter Dank gilt meinen Eltern Beate und …