Le Bras Hervé and Roussel Louis. ? Delay in Marriage or Refusal to Marry? Recent Movements in First Marriages in France and Prospects for the Future. Two series of age-specific rates of first marriage are studied (those for France and Sweden between 1972 and 1980). Simulation methods are used...

Le Bras Hervé and Chesnais Jean-Claude. Towns and Shanty Towns in Developing Countries : Demographic Structure and Habitat. In developed countries, the age distribution of the population of a given locality is closely related to the age of the housing stock. A number of factors contribute to...

Le Bras Hervé. ? Social Origins of a Cohort of Students of the Ecole Polytechnique. A year's intake of students to the Ecole Polytechnique were questioned about their families and social origin. From the 272 replies received some anomalies emerged. It was found that in this group the social...

Le Bras Hervé and Chesnais Jean-Claude. Cycle of habitation and age of inhabitants. In a new type of settlement such as a new town or district, young couples with children predominate, whereas adolescents and old persons are absent. The development of this type of population poses many...

Le Bras Hervé. ? Fluctuations and Growth of Populations Subjects to a Constraint. Fluctuations in populations which are observed or forecast in some circumstances are generally caused by a constraint on the population. It is shown that such situations can almost always be described in terms of...

The long term The period of population projections rarely exceeds 20 years. There is, therefore, some confusion between projections and forecasts. In this case, there is no ambiguity. The time-span is 100 years (2075) which shows clearly that the concern is with analyzing long-term consequences...