Advances in crop yields have come about primarily by increasing the plant populations per hectare and by increasing the ratio of grain to straw in individual plants.
Traditional production theory implies that if the price of a factor input is zero or close to zero that factor will be used until the value of its marginal product approaches zero. In the absence of more focused research efforts, it seems likely that the promised gains in agricultural productivity from biotechnology will continue to recede.
At the same time, women need the means to make choices: family planning and other reproductive health services. Direct evidence that family planning programs reduce unmet need and fertility comes from experiments such as the one undertaken in the Matlab district of Bangladesh.
There is a need for the establishment of substantial basic biological research and training capacity in the tropical developing countries. Powerful population and environment advocacy organizations primarily in the U. Increasing diversion of grains to biodiesel, ethanol, and meat production additionally decreases supplies available for human consumption Brown Nations can raise women's status by educating girls, by enforcing laws that prohibit child marriage, and by improving women's access to credit, land, jobs, and training.
The system of legal and economic institutions that govern the use of common property resources has failed to evolve in a manner consistent with a the rising demand for capacity to receive and assimilate the residuals associated with commodity production and consumption and 9 Boyce finds that in Bangladesh, where the institutional environment is severely biased by market imperfections and unequal distribution of economic and political resources, that differences in population density and population growth rates influence the rate and direction of technical change in a manner consistent with the induced technical change hypothesis pp.
Reproductive health specialists believe that at least million women in developing countries want, but do not have, the health care and contraceptive choices their richer sisters have long enjoyed.