On 2002-08-02 23:50, Number Two wrote:
More fun: how about doing generations (and cusps) purely by birthrates? here we get
pre-1940: silent (lowered rates)
1940 - 1945: silent/boom cusp (rates go up, then down; stagnating)
1946 - 1957: baby BOOM (nuff said :smile

1958 - 1964: stagnation (the beginning of Anthony's bust - rates fall but births stay above 4 million)
1965 - 197x: Generation X/baby bust (you can take the x as either a 5, 6, or

1977 (or 1976, or 1979) - 1984 (or 1986): stagnation at the X/Mill cusp
1985 (or 1987) or later: Millies
What's surprising is just how well this lines up with the archetypal generational boundaries (although Justin '79 and Mark Y might disagree here...)