This e-book explores profitablity in corporations - centered on Greece. The first paper seeks to investigate the contribution of marketing and research and development (R&D) strategies to the profitability of Greek companies. Prior evidence suggests the existence of asymmetric timeliness in the reporting of good and bad news of firms that trade in the Athens Stock Exchange. The second paper explores whether these results are consistent with inferences related to persistence property of earnings for firms that trade in the Athens Stock Exchange. The third paper examines the determinants of profitability for a sample of Greek non-financial firms listed in the Athens Stock Exchange for the period 1995-2003. This is a very important period for the Greek economy on the way to European monetary union (EMU). The final paper shows how the influence of the diffusion speed of a financial innovation (FI) increases the operational risk (OR) in any business line with different rate.