Chapter nine. Does Horizontal Differentiation Make Any Difference?

2020 ◽  
pp. 216-239
2021 ◽  
Vol 31 ◽  
pp. 00029
Author(s):  
Oksana Tsandekova

The activity of hydrolytic enzymes in the soil of dry valley phytocenoses under the influence of ash-leaved maple was investigated. The research objects were selected taking into account the ranking of plantations by crown density. Soil samples were collected depending on the horizontal differentiation of communities in the undercrown and outer zones of phytogenic fields. An increase in the enzyme activity during the period of active tree growth among experimental and control samples was established. Among the enzymes, invertase demonstrated the highest activity, while protease and phosphatase were characterised by medium activity. An increased invertase activity was found in the trees with a high crown density as compared to the trees of other groups. The obtained data can be used as diagnostic indicators of soil condition for monitoring natural ecosystems.


Author(s):  
Barbara Glowczewski

This chapter systematically analyses Warlpiri taboos showing how they can all be dispatched into four contexts (socialisation rituals, totemic relationships, mother-in-law/son-in-law relation, death) and four domains (space, language, sexuality and goods, especially food). Each combination of a context and a domain virtualises forms of obligations and ritual transgressions, which connect all taboos in a hypercubic way (see chapter 6). In that underlying entanglement of prohibitions and transgressions, any structural dualism seems to be conjured. Taboos become a way to create human and non human heterogeneous temporality, both as a vertical transmission – in the succession of generations re-enacted through socialisation and mourning rituals – and as a horizontal differentiation perpetually redefining these modalities of alliance and of ritual interdependance between the totemic groups. Everybody has an interest in reproducing a balance that respects the Law and pressing others to do the same, as well as giving what he/she has so that others will reciprocate. Such a social pressure partly explains the refusal to accumulate and the systematic circulation of all possessions, cars, clothes, etc., although it does not prevent conflicts. In fact, a certain dissensus is valued. First published in French in 1991.


Author(s):  
Alioune Dème

The study of West Africa has contributed to the expansion of comparative arid-lands floodplain prehistory, from both the data collection (cultural and historical) and the theoretical aspects. The neoevolutionary approach that often pictures Africa as a backward continent has been successfully challenged. In the Middle Senegal Valley and in the Inland Niger Delta, research on their societies’ complexity done along these two subcontinent’s floodplains has described new processes (including urbanization) that were not previously featured in the archaeological literature. The two floodplains, because of their ecological diversity, with the richness of their ecological diversity, attracted Saharan populations affected by drought at the end of the second millennium and the first millennium BC. However, after their initiation occupation the two areas took different trajectories in complexity and settlement organization. Large complex settlements have been found at Jenne-jeno and in the Ile a Morphil that illustrate whole new trajectories of civilization. These forms of complexity, found in areas with historically known polities, were not included in the range of possibilities predicted by standard complexity theories regarding civilizational development. Ethnographic and historical data, reveal the existence of societies with a central authority embedded within and balanced by a diffuse, segmented and heterarchical power structure; often as a strategy to resist the individual consolidation of power. These societies exhibit evidence of horizontal differentiation and consensus-based decision making. All these types of organization are characterized by the presence of several sources of power vested in corporate entities, such as lineages, age groups, cults and secret societies.


2010 ◽  
Vol 10 (3) ◽  
pp. 165-188 ◽  
Author(s):  
João Correia-da-Silva ◽  
Joana Pinho

2012 ◽  
Vol 12 (1) ◽  
Author(s):  
Illtae Ahn ◽  
Kiho Yoon

Abstract We examine mixed bundling in a competitive environment that incorporates vertical product differentiation. We show that, compared to the equilibrium without bundling, (i) prices, profits and social welfare are lower, whereas (ii) consumer surplus is higher in the equilibrium with mixed bundling. In addition, the population of consumers who purchase both products from the same firm is larger in the equilibrium with mixed bundling. These results are largely in line with those obtained in the previous literature on competitive mixed bundling with horizontal differentiation. Further, we conduct a comparative static analysis with respect to changes in quality differentiation parameters. When the quality gap between brands narrows under no bundling and symmetric mixed bundling, prices and profits decrease. When quality differentiation is asymmetric across products, however, complicated effects occur on prices and profits due to strategic interdependence that mixed bundling creates.


Author(s):  
David Bardey ◽  
Jean-Marc Bourgeon

Abstract We develop a model in which two insurers and two health care providers compete for a fixed mass of policyholders. Insurers compete in premium and offer coverage against financial consequences of health risk. They have the possibility to sign agreements with providers to establish a health care network. Providers, partially altruistic, are horizontally differentiated with respect to their physical address. They choose the health care quality and compete in price. First, we show that policyholders are better off under a competition between conventional insurance rather than under a competition between integrated insurers (Managed Care Organizations). Second, we reveal that the competition between a conventional insurer and a Managed Care Organization (MCO) leads to a similar equilibrium than the competition between two MCOs characterized by a different objective, i.e. private versus mutual. Third, we point out that the ex ante providers' horizontal differentiation leads to an exclusionary equilibrium in which both insurers select one distinct provider. This result is in sharp contrast with frameworks that introduce the concept of option value to model the (ex post) horizontal differentiation between providers.


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