Patterns and determinants of urban chicken consumption in Haiti and Cameroon: similar contexts, differentiated prospects

Since the beginning of 2000s, in order to let poor people accede to meat consumption, several African and Caribbean countries have opened their domestic chicken market to foreign imports, by reducing import tariffs. Thus imported frozen pieces of chicken from the European Union or America compete with local chicken meat, causing the collapse of many poultry husbandry and the loss of many jobs in the local chicken food chain. In order to highlight the determinants of urban consumer’s choice relative to chicken types, and assess the opportunity for local chicken to restore its market share, investigations have been done in 2005 in Yaoundé (Cameroon) and in 2006 in Port-au-Prince (Haiti) applied to 180 urban households in each country. While imported frozen pieces of chicken have almost entirely substituted for the local chicken which has already quite disappeared in Port-au-Prince, Yaoundé consumers still prefer the local flesh chicken to the imported ones, at least for particular uses.chicken, urban consumption, developing countries, globalization, Cameroon, Haiti

Food Sovereignty and Agricultural Trade Policy Commitments: What are the Margins of Manoeuvre for West African States?

International Relations/Trade,

Evolution of urban chicken consumption in Southern countries: a comparison between Haiti and Cameroon

Since the beginning of 2000s, in order to let poor people accede to meat consumption, several developing countries have opened their domestic chicken market to foreign imports, by reducing import tariffs. Thus local chicken meat competes with frozen pieces of chicken imported from the European Union or America, causing the loss of many jobs in the local chicken food chain. In order to highlight the determinants of urban consumer’s choice relative to chicken types, and assess the opportunity for local chicken to restore its market share, investigations have been done in 2005 and 2006, in Yaoundé (Cameroon) and at Port-au-Prince (Haiti) applied to 180 urban households in each country. While imported frozen pieces of chicken have almost entirely substituted for the local chicken which has already quite disappeared in Portau- Prince, Yaoundé consumers still prefer the local flesh chicken to the imported ones, at least for particular uses.Chicken, urban consumption, developing countries, globalisation, Cameroon, Haiti., Food Consumption/Nutrition/Food Safety,

CO deficiency in galaxies of the Fornax cluster?

There is ample observational evidence that cluster galaxies are different from those in the field. Interaction with the hot intracluster medium affects the morphology of the galaxies, their gaseous content and possibly their star-formation activity. Tidal encounters between galaxies also play an important role. The atomic component has been investigated in detail for several clusters, among them our neighbor Virgo. With the Swedish-ESO 15 m telescope, we have observed in the 12CO(1-0) transition the 23 brightest spirals and lenticulars of the Formax cluster

Analysis and Design of Finite Alphabet Iterative Decoders Robust to Faulty Hardware

This paper addresses the problem of designing LDPC decoders robust to transient errors introduced by a faulty hardware. We assume that the faulty hardware introduces errors during the message passing updates and we propose a general framework for the definition of the message update faulty functions. Within this framework, we define symmetry conditions for the faulty functions, and derive two simple error models used in the analysis. With this analysis, we propose a new interpretation of the functional Density Evolution threshold previously introduced, and show its limitations in case of highly unreliable hardware. However, we show that under restricted decoder noise conditions, the functional threshold can be used to predict the convergence behavior of FAIDs under faulty hardware. In particular, we reveal the existence of robust and non-robust FAIDs and propose a framework for the design of robust decoders. We finally illustrate robust and non-robust decoders behaviors of finite length codes using Monte Carlo simulations.Comment: 30 pages, submitted to IEEE Transactions on Communication

Density Evolution and Functional Threshold for the Noisy Min-Sum Decoder

This paper investigates the behavior of the Min-Sum decoder running on noisy devices. The aim is to evaluate the robustness of the decoder in the presence of computation noise, e.g. due to faulty logic in the processing units, which represents a new source of errors that may occur during the decoding process. To this end, we first introduce probabilistic models for the arithmetic and logic units of the the finite-precision Min-Sum decoder, and then carry out the density evolution analysis of the noisy Min-Sum decoder. We show that in some particular cases, the noise introduced by the device can help the Min-Sum decoder to escape from fixed points attractors, and may actually result in an increased correction capacity with respect to the noiseless decoder. We also reveal the existence of a specific threshold phenomenon, referred to as functional threshold. The behavior of the noisy decoder is demonstrated in the asymptotic limit of the code-length -- by using "noisy" density evolution equations -- and it is also verified in the finite-length case by Monte-Carlo simulation.Comment: 46 pages (draft version); extended version of the paper with same title, submitted to IEEE Transactions on Communication

Food sovereignty and agricultural trade policy commitments: How much leeway do West African nations have?

The 2008 food crisis has challenged the political legitimacy and economic efficiency of the liberalization of international agricultural trade. An alternative vision defended by the food sovereignty movement is that long-term food security cannot rely on dependency on food imports, but must be built on the development of domestic production with enough barrier protection to shelter it from world price fluctuations and unfair trading. The purpose of this paper is to look into whether the West African nations can achieve food sovereignty given their various trade commitments and other external constraints. The particularity of our approach is to combine a historical economic analysis with a political approach to food sovereignty and trade commitments. Our results suggest that external brakes on the development of food sovereignty policies are marginal, as the countries still have unused room for manoeuvre to protect their smallholder agriculture under the terms of draft World Trade Organization agreements and Economic Partnership Agreements and under the international financial institutions’ recommendations. Rather, the international environment seems to be instrumented by West African states that do not manage to secure a national political consensus to drive structural reforms deemed vital and further the food security of the urban populations over the marginalized rural populations. Recently, the regional integration process has made headway with a common agricultural support and protection policy project that could herald an internal political balance more conducive to food-producing agriculture.food sovereignty, West Africa, protection, agricultural policy, WTO negotiations

Trends in family labour, hired labour and contract work on French and Swiss crop farms: The role of agricultural policies

The objective of this article is to analyse the trends in on-farm labour use, including own family labour, hired labour and contract work, and to assess the factors driving their evolution in France and in Switzerland during 1990-2007. A particular attention is given to agricultural policies, namely the level and type of support. Results indicate that crop area payments discourage the different labour demands in both countries, while environment and investment payments favour contract and hired labour in France. Contract labour and family labour are substitute and hired labour and family labour are complement in France.farm labour, hired labour, contract work, policies, Agricultural and Food Policy, Farm Management, Land Economics/Use,