a study of listed companies in Thailand Pongthep Vichaikul creator Venkatesh, Sundar Chairperson Donyaprueth Krairit Examination Committee Kumar, Arun Examination committee RTG Fellowship Scholarship donor text series technical report th Pathum Thani, Thailand Asian Institute of Technology 2010 continuing eng 52 leaves : ill. By using the panel data on 533 publicly-traded comp anies in Thailand stock exchanges on 1,266 observations from 2003 to 2007, the resear ch examine the relashionship between degree of family ownership, ownership struc ture and effects of family and external CEOs to the firm performance. The paper shows that the increase in the degree of the family ownership, the greater firm performance. In addition, the marriage networks bri ng even more positive effects to the firm performance in Thailand. As the degree of the family ownership increase with the inclusive of the percentage of the share held by th e marriage networks, the larger firm performance. Moreover, the study notes that the fam ily type of ownership outperforms others type of ownership structure. The findings al so suggest the positive effects from the external CEOs to the firm perofrmance in the no n-family-owned firms. Submitted in partial fulfillment of the requirements for the degree of Master of Business Administration Research Studies Project Report (M.B.A.) - Asian Institute of Technology, 2010 Family-owned business enterprises Thailand Asian Institute of Technology. http://203.159.5.9/ait-thesis/detail.php?q=B01600 http://203.159.5.9/ait-thesis/detail.php?q=B01600 110404 20260818085941.0