1,127 research outputs found
The IMF and Russia in the 1990s
This paper explains the IMF's impact on economic policies in Russia, focusing on where the IMF made a difference. The Russian economic and political leadership essentially determined economic policies. The IMF's influence was modest: it had a limited impact on overall fiscal policy and major structural reforms, but it had a positive impact on monetary policy. A tougher position on fiscal policy in 1996-98 might have produced a better outcome. The G-7's concerns weakened the IMF. However, the IMF played a major role in transferring knowledge about macroeconomic policymaking and implementation. Copyright 2006, International Monetary Fund
Commentary: primary emotional systems and personality: an evolutionary perspective
In Primary emotional systems and personality Christian Montag and Jaak Panksepp analyze how emotional systems are involved into the development of basic personality into an evolutionary framework. They also stress the importance of such investigation for the promotion of human welfare in the context of psychiatric research and practic
Ornamental plant domestication by aesthetics-driven human cultural niche construction
Unlike plants that were domesticated to secure food, the domestication and breeding of ornamental plants are driven by aesthetic values. Here, we examine the major elements of the extended evolutionary synthesis (EES) theory that bridges the gap between the biology of ornamental plant domestication and the sociocultural motivations behind it. We propose that it involves specific elements of cumulative cultural evolution (CCE), plant gene-human culture coevolution (PGHCC), and niche construction (NC). Moreover, ornamental plant domestication represents an aesthetics-driven dimension of human niche construction that coevolved with socioeconomic changes and the adoption of new scientific technologies. Initially functioning as symbolic and aesthetic assets, ornamental plants became globally marketed material commodities as a result of the co-dependence of human CCE and prestige-competition motivations
Niche inheritance: a cooperative pathway to enhance cancer cell fitness though ecosystem engineering
Cancer cells can be described as an invasive species that is able to
establish itself in a new environment. The concept of niche construction can be
utilized to describe the process by which cancer cells terraform their
environment, thereby engineering an ecosystem that promotes the genetic fitness
of the species. Ecological dispersion theory can then be utilized to describe
and model the steps and barriers involved in a successful diaspora as the
cancer cells leave the original host organ and migrate to new host organs to
successfully establish a new metastatic community. These ecological concepts
can be further utilized to define new diagnostic and therapeutic areas for
lethal cancers.Comment: 8 pages, 1 Table, 4 Figure
Evolution of virulence: triggering host inflammation allows invading pathogens to exclude competitors.
Virulence is generally considered to benefit parasites by enhancing resource-transfer from host to pathogen. Here, we offer an alternative framework where virulent immune-provoking behaviours and enhanced immune resistance are joint tactics of invading pathogens to eliminate resident competitors (transferring resources from resident to invading pathogen). The pathogen wins by creating a novel immunological challenge to which it is already adapted. We analyse a general ecological model of 'proactive invasion' where invaders not adapted to a local environment can succeed by changing it to one where they are better adapted than residents. However, the two-trait nature of the 'proactive' strategy (provocation of, and adaptation to environmental change) presents an evolutionary conundrum, as neither trait alone is favoured in a homogenous host population. We show that this conundrum can be resolved by allowing for host heterogeneity. We relate our model to emerging empirical findings on immunological mediation of parasite competition
Evolving the human niche
This is the author accepted manuscript. The final version is available from the National Academy of Sciences via the DOI in this record
Natural selection maximizes Fisher information
In biology, information flows from the environment to the genome by the
process of natural selection. But it has not been clear precisely what sort of
information metric properly describes natural selection. Here, I show that
Fisher information arises as the intrinsic metric of natural selection and
evolutionary dynamics. Maximizing the amount of Fisher information about the
environment captured by the population leads to Fisher's fundamental theorem of
natural selection, the most profound statement about how natural selection
influences evolutionary dynamics. I also show a relation between Fisher
information and Shannon information (entropy) that may help to unify the
correspondence between information and dynamics. Finally, I discuss possible
connections between the fundamental role of Fisher information in statistics,
biology, and other fields of science.Comment: Published version freely available at DOI listed her
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