Historically, industrial complexes along the Chao Phraya River
were developed earlier than others in the areas that used to be
paddy fields. Until the 1970s, industrial areas around Bangkok
were confined within an approximately 50 km from the capital,
and farmland lay farther outside. In the 1980s, more industrial
areas were developed in five provinces around Bangkok. That was
the results from efforts by the public and private sectors to attract
foreign companies to Thailand by developing paddy fields speci-
fically for industrial use and by building necessary infrastructures.
Consequently, industrial complexes are located in areas that used
to be paddy fields [17]. Additional incentives were also provided
by BOI and IEAT for foreign companies to make investment to start
their businesses in Thailand [18].