The improvement of prudential regulation in the crisis-ridden Asian countri
es is suggested by international organizations as a major lesson to be impl
emented. The effect from tighter regulation can be estimated by simulating
the crisis with new rules. The analysis for Thailand's commercial banks sho
ws that more effective prudential regulation could have lowered the impact
from credit risks to some degree. More important for the financial meltdown
were, however, certain macroeconomic risks. These are not covered by any e
xisting regulatory arrangements. Consequently, even many tightly regulated
German banks would not survive a macroeconomic shock as happened in Thailan
d.