In this book, I introduce basics of research methodologies in Arabic language which I believe is an unprecedented step. The conceptions, research frameworks, sampling and some detailed methods are given in this text book. Moreover, some analytical statistical methods are introduced to give...

This paper examines the relation between a series of past earnings increases and the credibility of voluntary management earnings forecasts. We demonstrate that both analyst forecast revisions and stock price reactions around management earnings forecasts that contain good news are more...

This paper examines the relation between firm-level implied volatility skew and the likelihood of extreme negative events, or crash risk. I show that volatility skew identifies which firms are likely to experience crashes, but only in short-window earnings announcement periods. The predictive...

By decomposing analysts' forecast errors into common and idiosyncratic components, we develop a simple model aimed at explaining the relationship between forecast uncertainty and analyst dispersion. Under this framework, we propose a new measure of earnings forecast uncertainty as the sum of...

A principal-components analysis demonstrates that common earnings factors explain a substantial portion of rm-level earnings variation, implying earnings shocks have substantial systematic components and are not almost fully diversifiable as prior literature has concluded. Furthermore, the...

Employing a broad sample of US firms over the period 1962 to 2009, we provide evidence of a liquidity risk impact on the fundamental earnings-returns relation. Specifically, we document that current liquidity risk has a positive moderating effect on the relation between current returns and next...

This paper articulates the links between relevance of an earnings component in forecasting (abnormal) earnings and its relevance in valuation in a nonlinear framework. The analysis shows that forecasting relevance does not imply valuation relevance even though valuation irrelevance is implied by...

Previous literature on earnings management has examined the maintained hypothesis that firms barely beating earnings benchmarks are earnings manipulators with earnings before accounting manipulation otherwise slightly below their benchmarks and has implemented research designs that treat all...

To address the question as to whether managers manipulate accounting numbers downwards prior to management buyouts (MBOs), we implement an industry-adjusted buyout-specific approach and receive an affirmative answer. In UK buyout companies, negative earnings manipulation (understating the...