Suppose China and Italy start with identical GDPs, but then China grows at 8 percent yearly, while Italy grows at 2 percent. Multiple Choice Italy's GDP would double in about 9 years, while China's GDP would double in 35 years. Over many years, a difference of 6 percent in growth rates would not make much difference in the size of the two country's economies. GDP in both countries would double in about 9 years. China's GDP would double in about 9 years, while Italy's GDP would double in 35 years