This paper investigates the relationship between per capita human capital investment and the fertility rate. In the first part of the article we analyze a theoretical model with endogenous birth rate in which we do not make any assumption on how fertility directly affects per capita human capital accumulation. The results obtained in this model are then compared with those of a more traditional...

Density-dependent genetic evolution was tested in experimental populations of Drosophila melanogaster subject for eight generations to natural selection under high (K-selection) or low (r-selection) population density regimes. The test consisted of determining at high and at low densities the per capita rate of population growth of the selected populations. At high densities, the K-selected pop...

The global nitrogen (N) cycle has been transformed by human use of reactive N as a consequence of increased demand for food and energy. Given the considerable impact of humans on the N cycle, it is essential that we raise awareness amongst the public and policy makers as this is the first step in providing individuals and governments the opportunity to reduce their impact on the N cycle and red...

background: although numerous studies have found deleterious effects of inbreeding on childhood and pre-reproductive mortality, one question remains inadequately addressed: dose inbreeding lead to increased childhood mortality rates in countries with high level of consanguinity? methods: to evaluate the public health impact of inbreeding on offspring mortality, the association between mean of i...

This paper examines the relationship between economic growth and tourism development in seven Mediterranean countries. The purpose of this paper is to investigate empirically the long-run relationship between economic growth and tourism development in a multivariate model with tourism real receipts per capita, the number of international tourist arrivals per capita; real effective exchange rate...