Introduction Many intergovernmental and governmental organizations produce their own interfaces for statistical data. With the exception of the Common Database which combines select data from many of the United Nations’ independent agencies, there is typically little cooperation for integrating data between agencies. Some universities have chosen to produce their own interface to merge data int...

This is a complement to the comparison theorem for improper integrals in the textbook. The vanilla version presented in the textbook is good enough to solve some very easy examples and it becomes exponentially gory with the complexity of the integral. Fortunately it is not hard to refine the statement in the book, and turn it into a powerful tool to estimate the convergence of arbitrarily compl...