While studies in other industries suggest that firm type, firm size, and time are important factors that explain the cross-sectional variations in abnormal stock market returns, studies in the area of IS security are inconclusive. In this study, we examine whether the characteristics of the incident – Attacker type, attacker’s objective, results of the attack, attack tools and access type influ...

Covid-19 pandemic is affecting the health of public, and it also impacting business economy. The main objective this paper to investigate impact on listed firms’ performance abnormal stock returns in Vietnam. To study performance, we collected data about announced earnings Q1/2020 Q4/2019 714 enterprises made comparison. results revealed enormous impacts performance. However, level influence va...

We study 6,686 IPOs spanning the period 1981-2005 and find that the new issues puzzle disappears in a Fama-French three-factor framework. IPOs do not underperform in the aftermarket on a risk-adjusted basis and do not underperform a matched sample of non-issuers. IPO underperformance is concentrated in the 1980’s and early 1990’s, and IPO’s either perform the same as the market, or outperform o...

We show that a one-sector real business cycle model with mild increasing returns-toscale and variable capital utilization is able to produce qualitatively realistic business cycles driven solely by aggregate demand shocks. In particular, a positive government spending shock can lead to simultaneous increases in output, consumption, investment, employment, labor productivity and the real wage. O...