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Search Results: 1 - 10 of 4094 matches for " Alain Yaya Koudoro "
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Evaluation of the Opuntia dillenii as Natural Coagulant in Water Clarification: Case of Treatment of Highly Turbid Surface Water  [PDF]
Yéwêgnon Alima Esther Irma Nougbodé, Cokou Pascal Agbangnan, Alain Yaya Koudoro, Comlan Achille Dèdjiho, Martin Pépin A?na, Daouda Mama, Dominique Codjo Koko Sohounhloué
Journal of Water Resource and Protection (JWARP) , 2013, DOI: 10.4236/jwarp.2013.512133
Abstract:

This study was performed in laboratory scale and consisted of the using of aqueous Opuntia dillenii solution for the clarification of very turbid surface water (Turbidities varying between 186 NTU and 418 NTU). This plant from Cactaceae family was used as a natural coagulant for the different clarification tests. The preliminary phytochemical Screening of the powder of this plant showed that it contains tanins, saponins and mucilages. Flocculation and coagulation tests showed that Opuntia dillenii can be used in highly turbid water treatment. The removal efficiency varied from 89% to 93% for the turbidity and suspended solids, and from 4% to 15% for the obvious color in water when we used the optimum values of this natural coagulant (1 mL to 10 mL). The successive addition of this natural coagulant and the lime, gave a better elimination of turbidity and suspended solids, and a good reduction for the color. The removal efficiency of the turbidity and suspended solids became more than 95% and the one of the color between 67% and 94%.

Non-Linear Effect of Remittances on Banking Sector Development: Panel Evidence from Developing Countries  [PDF]
Yaya Keho
Theoretical Economics Letters (TEL) , 2016, DOI: 10.4236/tel.2016.65105
Abstract: This paper examines the impact of remittances on financial sector development in a panel of 19 developing countries. Contrary to previous studies that focus on mean effects, it uses quantile regression methodology to examine whether the effect of remittances on financial development is the same for less and more financially developed countries. The results point out that remittances promote financial development only in less financially developed countries. Further, the effect of income is positive and larger in less financially developed countries. Trade openness is positively related to financial development while inflation and urbanization are negatively related to it.
Manufacturing and Economic Growth in ECOWAS Countries: A Test of Kaldor’s First Law  [PDF]
Yaya Keho
Modern Economy (ME) , 2018, DOI: 10.4236/me.2018.95057
Abstract: Kaldor’s first growth law posits that the growth rate of an economy is positively related to the growth rate of its manufacturing sector. Since the sixties, this relationship has been examined in a large number of studies using a wide variety of data sets and econometric methods. This paper examines the validity of this law for 11 ECOWAS member countries over the period 1970-2014 by employing an Autoregressive Distributed Lag bounds test approach to cointegration and Granger causality tests. The results show that manufacturing output growth causes positively economic growth and non-manufacturing output growth, thereby providing support for Kaldor’s first growth law. The policy recommendation from the results of the study is that structural transformation in favour of industrial production activities would help to accelerate economic growth in ECOWAS countries.
Impact of Government Spending on Private Consumption: Evidence from ECOWAS Countries  [PDF]
Yaya Keho
Modern Economy (ME) , 2019, DOI: 10.4236/me.2019.103041
Abstract:

This study examines the impact of government spending on household consumption for the Economic Community of West African States (ECOWAS). As a modelling strategy, we use the Common Correlated Effect Mean Group (CCEMG) estimator that accounts for both parameter heterogeneity and cross-sectional dependence. The study provides various pieces of evidence through whole-panel and country-level analyses. The panel estimates indicate that government consumption has, on average, a negative effect on private consumption, implying that government and private consumption are substitutes. Country-level results reveal, however, considerable heterogeneity in the degree of substitutability across countries. They show crowding out effects in six countries, crowding in effects in one country and no significant effect in five countries. Therefore, government consumption is not a good instrument to stimulate aggregate demand and economic growth in ECOWAS countries.

An Econometric Analysis of the Determinants of Private Consumption in Cote d’Ivoire  [PDF]
Yaya Keho
Theoretical Economics Letters (TEL) , 2019, DOI: 10.4236/tel.2019.94061
Abstract: This study investigates the determinants of private consumption expenditure in Cote d’Ivoire using time series data from 1970 to 2016. The Autoregressive Distributed Lags bounds testing approach to cointegration is employed to depict the presence of a long run relationship between private consumption and its determinants and an error correction model is estimated to derive short run dynamics. The results show the presence of a long run relationship among the selected variables. In the long run, current income, wealth and government consumption expenditure play a positive role in determining private consumption, with the effect of current income being higher. Furthermore, consumption expenditure is negatively affected by inflation rate and real interest rate on deposits. In the short run, only income and wealth appear to have positive effects on private consumption while the effects of government consumption, inflation and interest rate were found to be insignificant. This study provides evidence for government to improve the level of private consumption.
Tax Structure and Economic Growth in Cote dIvoire: Are Some Taxes Better Than Others?
Yaya KEHO
Asian Economic and Financial Review , 2011,
Abstract: This paper examines the relationships between taxation and output in C te d’Ivoire during the period 1960-2006. The bounds testing approach to cointegration devised by Pesaran et al. (2001) showed that tax variables, except direct tax, and real GDP are cointegrated and positively related in the long-run. The results of Granger causality tests indicated bidirectional causality between tax revenues and output in the long-run, implying a virtuous circle of tax and GDP. Direct taxes, however, did not cause GDP both in the short and long-run. These findings suggest that i) the tax revenues and, therefore, budget deficit, depend upon the economic activity, and ii) switching the tax burden from direct to indirect taxes is likely to have a positive effect on the economic output.
Extending the Frontiers of Library Services through the Internet
AU Achonna, JA Yaya
Samaru Journal of Information Studies , 2008,
Abstract: This paper examines the tremendous developments that have taken place in the Library and Information services from inception to the present day with a focus on the role of the Internet in these developmental trends. The prelude and the history of Internet were x-rayed with an insight into the meaning of the Internet. The role of the Internet in extending the frontiers of Library and Information services were explored with a review of the situation of Internet connectivity in Nigeria, the problems and recommendations.
Impact of FDI on Economic Development: A Causality Analysis for Singapore, 1976 – 2002
Mete Feridun,Yaya Sissoko
International Journal of Economic Sciences and Applied Research , 2011,
Abstract: This study examines the relationship between economic growth as measured by GDP per capita and foreign direct investment for Singapore, using the methodology of Granger causality and vector auto regression (VAR). Evidence shows that there is a unidirectional Granger causation from foreign direct investment to economic growth.
Guérir le système de santé canadien dans un contexte de crise cumulative de l’offre et du financement : enjeux, défis et opportunités
H. SANNI YAYA
Aporia : The Nursing Journal , 2009,
Abstract: Les Canadiens ont à une certaine époque pensé qu’ils avaient le meilleur système de santé du monde. Aujourd’hui, ils en sont moins s rs et, surtout, ils se demandent si ce système est viable et si les valeurs qui le sous-tendent survivront à l’épreuve du temps. Ici comme ailleurs, les co ts de la santé fl ambent. Les systèmes de soins, qu’ils soient bismarckiens, beveridgiens ou libéraux sont en crise. Les gouvernements ont entrepris divers chantiers de réforme car le statu quo est devenu insoutenable. Au Canada, les thèmes débattus aujourd’hui sont les mêmes qu’il y a une dizaine d’année. Quelles réformes engager ? Comment remettre sur les rails un système de santé public mal en point et condamné à un rendement bien en-dessous de son potentiel ? Comment batir un système à la fois accessible et effi cient, dans un contexte ou les initiatives sérieuses sont soit, trop diffi ciles à mettre en oeuvre, soit politiquement ingérables ? Cet article allie une analyse des questions conjoncturelles à une réfl exion sur les problèmes structurels du système canadien de santé.
A Model of Spatial Spread of an Infection with Applications to HIV/AIDS in Mali  [PDF]
Ouaténi Diallo, Yaya Koné, Jér?me Pousin
Applied Mathematics (AM) , 2012, DOI: 10.4236/am.2012.312256
Abstract: In this paper we introduce a classical SI model to capture the spread of an infectious disease within a population. More precisely, the spatial diffusion of HIV/AIDS in a population is modeled. For that, we assume that the spread is due to the anarchical comportment of infected individuals along a road, especially, “lorry drivers”. The question which consists of the control of the infection is also addressed. Infected individuals moving from a town to another one, the diffusion is then anisotropic with a main direction of propagation, namely the road direction. Using a semi-group argument and a maximum principle, the uniqueness of a solution to the problem is established. This solution is also estimated. We end this paper by considering some numerical experiments in the case of HIV/AIDS spread in Mali along a road connecting two towns.
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