List of Articles رفتار توده وار و سرمایه گذاری ناکارآمد مدیران Open Access Article Abstract Page Full-Text 1 - provide a model to check MANAGERS' OVERCONFIDENCE, RISK PREFERENCE, HERD BEHAVIOR AND NON-EFFICIENT INVESTMENT( approach based on game theory ) Vahideh Asgari Yahya Kamyabi Mehdi Khalil poor