Review the data on the demographic transitions for one developed and one less developed country. For instance, you could study the demographic transitions of England and Sri Lanka (see Gillis, Perkins, Roemer, and Snodgrass [1997, Chapter 7]) and make sure that you understand the main trends in birth rates, death rates, and net population growth rates. Think about and explain the reasons why the picture for Sri Lanka looks more “compressed” in time than the corresponding picture for England.