Determinants of Demand for Delivery Services in Sudan: An Empirical Investigation with Reference to Khartoum State, 2004*

Abstract: Using multinomial logistic methods, we examined the determinants of the delivery care seeking behavior of women in Khartoum State of Sudan, as well as the impact of changes in the attributes of public delivery services on the market shares of delivery services. Time distance and transportation cost have significant negative effects, while the random ‘quality’ coefficient is positive but not significantly different from zero. Further, the likelihood of choosing home over public delivery services increases with order of birth. The positive effects of women's education and household income are most important for those who prefer private over home delivery whereas the use of modern antenatal services is decisive in choosing modern over home delivery. Also, shifts in demand toward public delivery services resulting from improvements in quality and qualifications of medical staff might be undermined by the reduction in demand emanating from a rise in the order of delivery, time distance and transportation cost to public delivery institutions. The income effects are more pronounced, particularly for the share of private delivery services. Educated women tend to shift from home to modern delivery services.     

Group Decision Support Using Fuzzy Cognitive Maps for Causal Reasoning

Cognitive maps have been used for analysing and aiding decision-making by investigating causal links among relevant domain concepts. A fuzzy cognitive map (FCM) is an extension of a cognitive map with the additional capability of representing feedback through weighted causal links. FCMs can be used as tools for both static as well as dynamic analysis of scenarios evolving with time. An FCM represents an expert's domain knowledge in a form that lends itself to relatively easy integration into a collective knowledge base for a group involved in a decision process. The resulting group FCM has the potential to serve as a useful tool in a group decision support environment. An appropriate methodology for the development and analysis of group FCMs is required. A framework for such a methodology consisting of the development and application phases is presented.     

Cournot, Bertrand, and game theory: A further note

This note synthesizes the discussion on the role of Cournot and Bertrand in the analysis of duopoly by drawing on the history of the debate. We conclude that while Bertrand presented a critique of the mathematical economics of Cournot and stimulated the analysis of strategic choice in game theory, he did not present a duopoly model with price as a strategic variable, as opposed to Cournot's model with quantity. In fact, Cournot has both types of models. We show that Irving Fisher contributed to the myth about Bertrand's duopoly theory.     

The Role of Credit in the 2007–09 Great Recession

This paper examines the financial crisis of 2007/9 and the downturn in the U.S. We argue that effective demand over the 2001?C2006 expansion was maintained by credit. The role of credit in a Vector Error Correction Model and Granger-causality between aggregate spending, credit, disposable income, and profits are examined. We show that credit itself is determined by factors outside the circular flow of income. The results raise new hypotheses about the crucial relationships in macroeconomics that sustain aggregate spending. We then compute the generalized impulse responses in the VECM to demonstrate the severity of the downturn and show that legislative changes that dismantled the restrictions placed on the financial sector and the consequent structural changes after 1980 enabled the growth of new debt instruments and credit. The overexpansion of credit when profits and house prices were declining in 2005/06 and informational asymmetries on the quality of credit and its sudden withdrawal in 2007 paralyzed the economy and led to the Great Recession.     

The Role of Capital Flight and Remittances in Current Account Sustainability in Sub‐Saharan Africa

Abstract: The literature on capital flight and remittances is copious, as a plethora of studies in recent years have focused greater attention on the determinants and impact of capital flight and remittances in the development process. These issues are particularly pertinent to Africa in view of its relatively high incidence of capital flight in the presence of foreign exchange constraints, limited foreign capital inflows, external indebtedness and high dependence on overseas development assistance. The principal aim of this paper is to estimate the extent and magnitude of capital flights from Africa and remittance inflows to Africa, and to assess their role in current account sustainability. The paper employs standard methodological approaches to estimating capital flight and remittances for selected African countries and analyses their relationships with current account balance and key economic indicators. The findings from the statistical exercises in the paper yielded a number of important results:

• ? The magnitude of capital flight from Africa has increased considerably in recent years, with widespread fluctuations and volatility.
• ? The volume of remittances into Africa has increased dramatically but steadily.
• ? There is a negative association between balances on current account and capital flight, implying that capital flights tend to worsen current account difficulties.
• ? There is a positive relationship between remittances and current account, suggesting that remittances could play an important role in mitigating current account problems.
• ? The link between remittances and economic growth is positive, albeit insignificantly in the statistical sense, suggesting some evidence of the crucial role of remittances in the economic growth and development process.
• ? External debt and capital flight are positively intertwined, providing support to the so‐called ‘round‐tripping’ or ‘back‐to‐back’ hypothesis

The policy implications of these findings are that in spite of the good progress made by many African countries towards economic and political reforms, more innovative policy thinking and reform deepening must be initiated to create a conducive environment for private sector participation in general and foreign capital (including capital flight reversal) in particular. Similarly, there is a need for incentivising and mainstreaming remittances into national development strategies with the view to promoting the growth‐enhancing effects of remittances. A wide range of policy options and forward thinking analyses were advanced in the paper.     

On the real effects of inflation in open economies: theory and empirics

Based on the quarterly data from four open economies (the US, the UK, Canada, and Italy) and estimated correlations and impulse responses within the traditional vector autoregressive (VAR) analysis, we find that inflation, both in the short and long term, negatively affects consumption and investment, and has a positive influence on the current account. We propose an infinite-horizon optimizing model of an open economy with a fixed rate of time preference that explains these empirics. In this type of economy, households consume both durable and non-durable goods, firms operate under costly investment, and all the transactions involving consumption and investment are subject to cash-in-advance (CIA) constraints. Employing the new ‘sign restriction’ identification procedure due to Uhlig (J Mone’t Econ 52(2)381–419, 2005), we corroborate the empirical validity of the proposed model. In order to verify the robustness of our results, we consider another shock, namely, productivity shock in our empirical analysis and find that while productivity shock dominates in the case of the US, inflationary shock has a dominating effect in the case of the UK, Canada, and Italy.     

A NEW APPROXIMATE GLS ESTIMATOR FOR THE REGRESSION MODEL WITH MA(1) DISTURBANCES

This paper introduces a new approximate GLS estimator for the regression model with MA(1) disturbances, which outperforms both the Balestra (1980) and the Park and Heikes (1983) approximations and which is almost as efficient as the exact GLS estimator.