Response options: 18-22 years old, 23-26 years old, 27-30 years old, 31-35 years old, 36-42 years old, 43-50 years old, 51+ years old, Decline to answer
Response options: Merged Arab Barometer data set (allarab), Arab Barometer, Palestine (pa08arab), NSF, Algeria (al04nsf), NSF, Jordan (jo03nsf), NSF, Morocco (mo05nsf), NSF, Kuwait (ku05nsf), NSF, Palestine (pa03nsf), NSF, Yemen (ye06nsf), World Values Survey (allwvs), World Value Survey, Iraq (irq06wvs), World Values Survey, Second Wave (wvs2), World Values Survey, Second Wave, Iran (wvs2iran), Arab Barometer, Jordan (jo08arab), Egypt and Kuwait 1988 (eg&ku1988), Palestine 1995 (pa1995), Palestine 1999 (pa1999), World Values Survey, Third Wave, Qatar (qat2010)