The paper discusses the utilization of social complexity studies to enhance our understanding on many social phenomena. The discussions brings the concept of uncertainty in almost everything of social realms and makes some points related to the empirical findings of the power-law distributions...

The present study constructs a decision support system to determine the best seeding rate out of a group of seeding rates applied in the field. The DSS has been built receives the field data as inputs, and then apply split plot algorithms of (Gomez & Gomez, 1984) to find the results. These...

In countries where tools of economic control are immature and disabled due to totalitarian systems, macroeconomic analyses for aggregate quantities and relationships, such as total consumption, investment, and government expenditures represents a difficult task. The practice of aggregation...

The study focuses on the HIV/AIDS in Khartoum state during the period (2003-2007). The main objectives are to study the situation of HIV/AIDS in Khartoum state through a sample of 1439 of volunteers for the three selected blood testing and counseling centers in Khartoum, Omdurman, and Khartoum...

In the first meta-study on the finance-growth nexus, we bridge the gap between Schumpeterian authors and sympathizers of Andersen & Tarp (2003). Over 20 fundamental characteristics that have influenced the debate over the last decades are examined. The empirical evidence is based on 196 outcomes...

This is a summary of the paper entitled : “The Mean Squared Prediction Error Paradox”. In that paper, we show that traditional comparisons of Mean Squared Prediction Error (MSPE) between two competing forecasts may be highly controversial. This is so because when some specific conditions of...

We propose a stochastic spanning approach to assess whether a traditional portfolio of stocks and bonds spans augmented portfolios including commodities, foreign exchange, and real estate. We empirically show that in all seven portfolio combinations, the augmented portfolio is not spanned by the...

This draft is a summary of the paper entitled: Forecasting Fuel Prices with the Chilean Exchange Rate. In that paper we show that the Chilean exchange rate has the ability to predict the returns of oil prices and of three additional oil-related products: gasoline, propane and heating oil. The...

Resource misallocation can lower aggregate total factor productivity (TFP).We use microdata on manufacturing establishments to quantify the potential extent of misallocation in China and India versus the United States. We measure sizable gaps in marginal products of labor and capital across...

The present study reviews the determination of the crop yield issues. Data analysis and utilization in the determination is essential for better production and economic performance. We follow the method of Williamson (1988) in discussing those issue and briefly compare them to application in Sudan.