Without it, judgments about the quality of colleges will be based on "flawed" rankings, says the Organisation for Economic Co-operation and Development's director for education and skills.
A legal fight over workplace training has left thousands of students in limbo and could threaten the international appeal of American universities.
An investigation by The Times revealed that nearly 50,000 students, many of them from overseas, were caught cheating in the last three years.
Arab interest in attending American colleges continues to grow, while few students from the United States study in the Middle East and North Africa.
More than three-quarters of new students pursue master’s or graduate certificates, but the interest varies greatly by country.
The bloc wants to ease entrance and residency rules as part of a larger effort to make it more economically competitive globally.
The Russian government is pushing top universities to hire more overseas scientists as part of an effort to bolster the institutions' international standings.
A majority of the world's researchers -- 72 percent -- reside in China, the European Union, Japan, Russia, and the United States, says Unesco.