The paper develops a general equilibriummodel where population sources, such as fertility and mortality rates, are chosen variables. It is shown that the evolution of population over time depends on income and relative prices of mortality and fertility rates. Initially as a country develops, countries should face a period with increasing fertility and higher population growth rates but later fe...

A recent analysis suggested that historical climate forcing on the oceanic habitat of neonate sea turtles explained two-thirds of interannual variability in contemporary loggerhead (Caretta caretta) sea turtle nest counts in Florida, where nearly 90% of all nesting by this species in the Northwest Atlantic Ocean occurs. Here, we show that associations between annual nest counts and climate cond...

Newly available information on the excavation of the Portuguese Mesolithic shell middens, Cabeço da Arruda and Moita do Sebastião, has allowed reassessment of the paleodemography of the sites. Following the restudy of Arruda and an examination of Moita site structure, we now discuss the problem of arriving at a minimum number of individuals (MNI) for Moita and use the age distribution of the de...

Why have some countries done so much better than others over the recent past? In order to shed new light on this issue, this paper provides a decomposition of the change in the distribution of output–per–worker across countries over the period 1960–98. The main finding of the paper is that most of the change in shape of the world distribution of income between 1960–1998 can be accounted for by ...

It is obviously possible in any country or community of reasonable size to determine an empirical equation, by ordinary methods of curve fitting, which will describe the normal rate of population growth. Such a determination will not necessarily give any inkling whatever as to the underlying organic laws of population growth in a particular community. It will simply give a rather exact empirica...

Neonatal health care is concerned with the condition of the newborn from birth to 4 weeks (28 days) of age. Neonatal survival is a very sensitive indicator of population growth and socio-economic development. The survival rate of female infants correlates to subsequent population replacement. For these reasons, the issue of neonatal deaths is a serious national health concern, especially in dev...

From 1938 to 1972, the range of California sea otters (Enhydra lutris nereis) expanded with the northern and southern fronts spreading at rates of approximately 1.4 km/yr and 3.1 km/yr, respectively. J. A. Lubina and S. A. Levin proposed the following three factors to explain the large disparity in spread rates: (1) regional differences in dispersal; (2) regional differences in population growt...

Relative population growth affects relative prices through the so-called BalassaSamuelson (BS) mechanism and that in turn impacts PPP. This paper empirically investigates the relationship between PPP exchange rate and relative population growth in a panel of 80 selected countries. Following the Balassa-Samuelson hypothesis this paper argues that relative population growth affects nominal wages ...

We analyzed the effects of population density and climatic variables on the rate of population growth in the guanaco ( Lama guanicoe), a wild camelid species in South America. We used a time series of 36 years (1977-2012) of population sampling in Tierra del Fuego, Chile. Individuals were grouped in three age-classes: newborns, juveniles, and adults; for each year a female population transition...