List of Articles Bid Ask SpreaD Open Access Article Abstract Page Full-Text 1 - An Investigation of Affecting Factors in Bid Ask Spread as a Measure for Information Asymmetry Heidar Foroughnejad Mohsen Moradijoz Open Access Article Abstract Page Full-Text 2 - The Effect of Some Corporate Governance Tools on Information Asymmetry around Quarterly Earnings Announcement with Autoregressive Vector Model Mohsen Dastgir Javad Aghanaghi Amir Rasaiian