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The objective in this paper is to review several theoretical issues associated with fiscal policy and to test these theories via a reduced form real GNP equation using quarterly U.S. data from 1958 through 1966. Theoretical work by Friedman, Holmes and Smith, and others suggest (for different reasons) that fiscal policy may be ineffective. Holmes and Smith point out that increases in taxes may conceivably increase aggregate demand if the demand for money depends on disposable income. Higher taxes shift the IS curve to the left as usual. However, higher taxes reduce disposable income and decrease the demand for money. With a constant money supply, the LM curve shifts to the right and the lower equilibrium interest rate increases aggregate demand. The net effect of the opposite shifts in IS & LM could conceivably be an increase in income. Similarly, lower taxes may conceivably lower equilibrium income. The argument of Friedman and others runs along different lines. They emphasize that any change in government expenditure or change in taxes may temporarily alter real income, but any “pure” fiscal policy must be accompanied by a change in government debt. The larger debt that accompanies a fiscal expansion raises interest rates and eventually reduces private demand. The fiscal expansion can allegedly “crowd out” private expenditure completely so that the net long run effect on real income is zero.

Macro models are being developed in Islamic economics literature. These models, in general, follow the program of Islamization of knowledge and combine the genuine characteristics of Islamic economics with the tools of mainstream economics. The founding leader of Millî Görüs movement in Turkey, Necmettin Erbakan, and a group of Islamic intellectuals, had developed an economic program known as the just system. This paper aims to attempt to model the just economic system (the JES) with appropriate econometric techniques.

This paper models the macroeconomics of the JES with linear equations and conducts a series of simulations to identify its outputs. Based on the closed economy assumption, this paper describes the production function with a government share, defines a charitable foundation sector, exclude the speculation motive in money demand. Savings are transferred into investments without interest. This paper also develops an econometric simultaneous-equation model of the JES.

According to the results obtained from the selected simulation scenarios, this paper concludes that the macroeconomic JES works well and produces desirable outputs as it was stated in the original program.

In future studies, the econometric estimations of the JES can be made. By adding more equations to the simple model, a medium or large scale JES macroeconomic model can be developed.

The JES can now be a source of economic policy designs.

The model can be used to address socioeconomic objectives.

It is the only Islamic economic model that has been ever developed in Turkey. The notion of the JES has not been subjected to enough economic analysis and as far as it is known, it has not yet been modeled and simulated.

This chapter presents the indirect preferences for all full rank Gorman and Lewbel demand systems. Each member in this class of demand models is a generalized quadratic expenditure system (GQES). This representation allows applied researchers to choose a small number of price indices and a function of income to specify any exactly aggregable demand system, without the need to revisit the questions of integrability of the demand equations or the implied form and structure of indirect preferences. This characterization also allows for the calculation of exact welfare measures for consumers, either in the aggregate or for specific classes of individuals, and other valuations of interest to applied researchers.

This paper examined the cointegrating properties of narrow money demand. Results suggest income and interest rate are sufficient for the formulation of a long‐run stable demand for money in Australia, Austria, Finland, Italy, UK, and US. However, for Canada, Germany, and Switzerland, the nominal effective exchange rate should be incorporated.

The purpose of this paper is to present an empirical analysis of the aggregated import demand behavior for Nigeria using annual data between 1980 and 2006.

The bounds test analysis was used to estimate the long‐run relationship between imports and its determinants.

Test results show that imports, income and relative prices are cointegrated. The estimated long‐run elasticities of import demand with respect to income and relative prices are 2.48 and −0.133, respectively.

These results suggest that the Marshall‐Lerner condition are not satisfied for Nigeria.