"In accordance with demographic developments, the age of retirement should increase as a result of [the] ageing of the population.... This article proposes to examine the relevance of this diagnosis as well as its implications [for France]. However as population ageing seems to go hand in hand with a decrease in the proposed retirement age, factors likely to explain this phenomenon are highlighted. Two analyses are proposed: one based on labour demand and income/leisure options and choices, and another on labour supply highlighting the untimely exclusion of older workers from the job market, especially marked in developed countries." (EXCERPT)