The main objective of this study is to investigate the level of accounting
information quality of listed companies on the Stock Exchange of Thailand (SET) and the
Shanghai Stock Exchange (SSE). In addition, the paper also compares the level of
accounting information quality of listed companies of two countries. Two perspectives of
accounting information quality are measured: market-based perspective (value relevance of
earnings) and accounting-based perspective (earnings persistence). The regression of stock
return on earnings per share is the representative of the value relevance of earnings whilst
the regression of future earnings on current earnings is the representative of earnings
persistence. The results indicate that earnings are value relevant information and they have
the persistence properties for listed companies on the SET and the SSE. For the pooledperiods
of the study, the value relevance of earnings of listed companies on the SET is more
than that of listed companies on the SSE. Similarly, earnings persistence of listed
companies on the SET is more than that of listed companies on the SSE significantly.