Abstract:
This research aims to study the relationship between board diversity(women directors,
directors age, foreigner directors, board independence and CEO duality) on firm performance
(return on assets, return on equity and Tobins Q). By making the use of 505 firm-years or 101
samples of listed companies from 2013 to 2017 which excluded financial sectors and real estate
funds, the group of undergoing operation rehabilitation and Market for alternative investment
(MAI) that are in the Stock Exchange of Thailand(SET). The collecting data are from an online
database provided by SET Market Analysis and Reporting Tool (SET SMART). The data were
analyzed by the econometric analysis program for testing all of the hypothesis. This study found
that only two variables have a positive relationship on firm performance which is the women
directors while measuring by return on equity and the directors age when measured by Tobins
Q. However, the foreigner directors, board independence and CEO duality have no relationship
toward firm performance which measured by return on asset, return on equity and Tobins Q