For decades, pension systems were based on the rising revenue generated by an expanding population (demographic dividend). As changes in fertility and longevity created new population structures, however, the dividend disappeared, but pension systems failed to adapt. They are kept solvent by...

The institutional structures of the various types of European welfare state were established around extra revenues called the "demographic dividend" that used to be easily available throughout the decades of the 20st century. They, however, ceased to be available at the end of that century. The...