فهرس المقالات Relative Bid-Ask Spread حرية الوصول المقاله صفحة الملخص نص كامل 1 - Stock Liquidity Measured by Relative Bid–Ask Spread and Its Role in Explaining Financial Leverage Under Financial Constraints Maryam Sadat Tabatabaeian Mohammad Amini Abdolrasoul Rahmanian Koushkaki