Final answer:
The anti-bribery convention is administered by the Organization of Economic Cooperation and Development (OECD) to combat international bribery and corruption.
Step-by-step explanation:
The anti-bribery convention that is administered by the International entity is The Organization of Economic Cooperation and Development (OECD). The OECD is an intergovernmental organization that provides a platform for countries to work together to promote economic growth, improve living standards, and contribute to global development. The OECD's Anti-Bribery Convention is an important instrument in combating international bribery and corruption.