The largest 40 companies listed on the Stock Exchange of Thailand at 31 December
1997, 1999, and 2001 were selected based on a size ranking of market capitalization.
These companies comprised 65.25, 73.90 and 62.43 percent of the total market
capitalization, respectively. For the purposes of analysis, the top 40 Thai companies
were classified into the four broad headings, namely, manufacturing, services, finance
and properties.