Students learn in microeconomics that the demand curve for a good, which shows the relationship between the price of a good and the quantity of the good that consumers demand-i.e. are willing, ready, and able to purchase-has a negative slope.
The UNICEF estimates that an average of 353,000 babies are born each day around the world. The crude birth rate is 18.9 births per 1,000 population or 255 births globally per minute or 4.3 births every second (as of Dec. 2013 estimate).
The number of second-generation immigrant children (born in the United States to foreign-born parents) has grown steadily since 1990. Between 1990 and 2000, the number of second-generation immigrant children grew 65 percent (from 6.3 million to 10.4 million).