Denmark responded to the baby crisis by creating commercials showing a sultry model wearing a black negligee, encouraging viewers to “Do it for Denmark.” Singapore, which has a birthrate of only 0.78, made a deal with Mentos (“The Freshmaker”) to promote “National Night” in which couples were told to let their “patriotism explode.” In South Korea couples earn cash and prizes for having more than one child, and in Russia they get a chance to win a refrigerator.

