Professor Gaechter says social order in general can be explained as a system in which individuals behave cooperatively and follow social rules.

VOA: special.2009.03.03

An assistant professor who receives tenure becomes an associate professor and may later be appointed a full professor.

VOA: special.2009.04.09

And: "A professor should not be annoyed with me if I receive an important call during class."

VOA: special.2009.03.12

An associate professor may later be appointed a full professor.

VOA: special.2010.09.02

A professor with tenure cannot be easily dismissed.

VOA: special.2009.04.09

Professor Rais says if Taliban and al-Qaida militants have relocated to Baluchistan, it could be a sign of desperation.

VOA: standard.2009.03.19

Sana'a University Economics Professor Taha al-Fusail says the energy sector may be a lifeline, but Yemen needs to diversify its economy if it wants to grow in a way that will fund the government and feed the people.

VOA: standard.2010.04.20