Regional Integration in the West African Economic and Monetary Union (WAEMU): Complementarity or Competition?

This paper analyzes and characterizes the nature of the interactions between countries of the West African Economic and Monetary Union (WAEMU) over the period 1995–2015. The analysis uses sigma-convergence on the one hand and the Dendrinos-Sonis spatial competition model estimated by the SUR method on the other hand. The results show a lack of convergence of living standards and support the idea of income polarization in space; these results also support the idea of a very poorly integrated region with relatively competitive interrelationships. The paper suggests the acceleration of regional integration in the WAEMU region combined with the implementation of inclusive integration policies that promote each member’s comparative advantage.

Slow expanders invade by forming dented fronts in microbial colonies

Most organisms grow in space, whether they are viruses spreading within a host tissue or invasive species colonizing a new continent. Evolution typically selects for higher expansion rates during spatial growth, but it has been suggested that slower expanders can take over under certain conditions. Here, we report an experimental observation of such population dynamics. We demonstrate that mutants that grow slower in isolation nevertheless win in competition, not only when the two types are intermixed, but also when they are spatially segregated into sectors. The latter was thought to be impossible because previous studies focused exclusively on the global competitions mediated by expansion velocities, but overlooked the local competitions at sector boundaries. Local competition, however, can enhance the velocity of either type at the sector boundary and thus alter expansion dynamics. We developed a theory that accounts for both local and global competitions and describes all possible sector shapes. In particular, the theory predicted that a slower on its own, but more competitive, mutant forms a dented V-shaped sector as it takes over the expansion front. Such sectors were indeed observed experimentally, and their shapes matched quantitatively with the theory. In simulations, we further explored several mechanisms that could provide slow expanders with a local competitive advantage and showed that they are all well-described by our theory. Taken together, our results shed light on previously unexplored outcomes of spatial competition and establish a universal framework to understand evolutionary and ecological dynamics in expanding populations.

Not the Far-Right Only: Which Parties Occupy the Niche of Cultural Protectionism in the EU Countries?

In the 2010s many moderate parties in Europe began to use the agenda of the far-rights, competing with them on the same field. This article is devoted to the problem of inter-party competition in European countries amidst the rise of far-right parties. We also intended to check if the far-right profile is the same for all EU countries. To achieve the goal of the study, we used two databases on party positioning - MARPOR (Comparative Manifesto Project) and CHES (Chapel Hill Expert Survey). The study revealed that the consolidated family of the far-rights exists only in the countries of North-Western Europe, while in the countries of East-Central Europe the agenda of the far-rights is less consolidated and regionally heterogeneous. The mainstream competitors of the far-rights included mostly conservatives in North-Western Europe, and various parties, including the Social Democrats, in East-Central Europe. The study confirmed the hypothesis about the serious influence of the far-rights on mainstream politics. At the same time, it questioned the traditional approach which attributes the far-right profile only to far-right parties and ignores both regional differences and the factor of spatial competition.

Universalism and uniqueness in contemporary soft power strategies

The author analyses the principles and regularities of the competition of soft power strategies of different states as an actual problem of comparative politics. The article addresses the question of determining principles and key elements of competing soft power strategies in the system of international relations, which is of current interest in comparative political science. As a methodological foundation of the analysis is used the H. Hotelling’s law of spatial competition and its political implications, formulated by A. Downs. The author examines two contrasting tendencies: drift of the content and strategies of soft power of different states towards unification and convergence of communicated values and standards or on the contrary increase of ideological and value polarization in the wake of escalating international and global tensions. The principles and rules of spatial competition of H. Hotelling and A. Downs have been applied for typology of national strategies of soft power to evaluate their effectiveness and segmentation of potential audience for maximum impact. It was concluded that, due to the polymodality and civilizational diversity of the world, universalist soft-power projects today can only have limited success, with significant costs and reputational losses, while attracting value-close countries and pushing away the others. This division provides the basis for the international clustering by interests and values

Successful microbial colonization of space in a more dispersed manner

Many organisms live in habitats with limited nutrients or space, competition for these resources is ubiquitous. Although spatial factors related to the population’s manner of colonizing space influences its success in spatial competition, what these factors are and to what extent they influence the outcome remains underexplored. Here, we applied a simulated competitive model to explore the spatial factors affecting outcomes of competition for space. By quantifying spatial factors, we show that colonizing space in a more dispersed manner contributes to microbial competitive success. We also find that the competitive edge deriving from a more dispersed manner in colonization can compensate for the disadvantage arising from either a lower growth rate or lower initial abundance. These findings shed light on the role of space colonization manners on maintaining biodiversity within ecosystems and provide novel insights critical for understanding how competition for space drives evolutionary innovation.

PV neurons improve cortical complex scene analysis by enhancing timing-based coding

Cortical representations underlying a wide range of cognitive abilities, which employ both rate and spike timing-based coding, emerge from underlying cortical circuits with a tremendous diversity of cell types. However, cell-type specific contributions to cortical coding are not well-understood. Here, we investigate the role of parvalbumin (PV) neurons in cortical complex scene analysis. Many complex scenes contain sensory stimuli, e.g., natural sounds, images, odors or vibrations, which are highly dynamic in time, competing with stimuli at other locations in space. PV neurons are thought to play a fundamental role in sculpting cortical temporal dynamics; yet their specific role in encoding complex scenes via timing-based codes, and the robustness of such temporal representations to spatial competition, have not been investigated. Here, we address these questions in auditory cortex using a cocktail party-like paradigm; integrating electrophysiology, optogenetic manipulations, and a family of novel spike-distance metrics, to dissect the contributions of PV neurons towards rate and timing-based coding. We find that PV neurons improve cortical discrimination of dynamic naturalistic sounds in a cocktail party-like setting by enhancing rapid temporal modulations in rate and spike timing reproducibility. Moreover, this temporal representation is maintained in the face of competing stimuli at other spatial locations, providing a robust code for complex scene analysis. These findings provide novel insights into the specific contributions of PV neurons in cortical coding of complex scenes.