List of Articles Transaction costs Open Access Article Abstract Page Full-Text 1 - An Investigation of methods to reduce transaction costs in Tehran Stock Exchange Romina Atrchi Shahin Ramtinnia Open Access Article Abstract Page Full-Text 2 - The Fuzzy Mean-Entropy Portfolio Model : Sensitivity Analysis, Transaction Costs Based on Credibility Theory Mahmoud Lari Dashtbayaz Shaban Mohammadi Nader Naghshbandi Open Access Article Abstract Page Full-Text 3 - The effects of outside board on firm value in Tehran Stock Exchange from the perspective of information transaction costs S. Jabbarzadeh Kangarlouei B. Kavasi M. Motavassel Open Access Article Abstract Page Full-Text 4 - .The role of firm size on the relationship between transaction costs and the competitiveness of auditing firms. fatemeh sarraf Open Access Article Abstract Page Full-Text 5 - Survey on fractional Black-scholes with hurst exponent on European option with transaction cost Morteza Rahmani Nahid Jafarian Open Access Article Abstract Page Full-Text 6 - Can digital currency technology help reduce transaction costs and improve access to financial services for underbanked populations? Bouayed Sarra