The cohort component projection algorithm: technique, model and theory?

If a student were to ask a North American demographer where to find a detailed treatment of population projections, chances are he or she would be sent to a text on demographic ￠ € techniques ￠ € or ￠ € methods, ￠ € or urged to take a course on ￠ € technical ￠ € demography. If the student were to look in a standard introductory textbook on population, or take a course on ￠ € population problems ￠ € or on ￠ € behavioural ￠ € or ￠ € substantive demography ￠ € chances are he or she would be exposed to at best a cursory treatment of population projections, with reference to their use in population forecasting or prediction.