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This paper aims to investigate whether empirical evidence for scale economies can be found across countries and if so, whether this evidence varies across the stage of development.

The paper uses statistical methods to make comparisons between countries.

The empirical results suggest overall evidence towards aggregate increasing returns across all samples. Within the Cobb‐Douglas framework, stronger evidence for aggregate increasing returns is found among samples depicting economies in the early stages of development. The CES framework in turn supports aggregate scale economies for advanced economies, while unitary elasticity of substitution cannot be rejected for less developed economies, giving further support for the Cobb‐Douglas estimates.

Given that evidence for scale economies is found within different estimation frameworks for different groups of economies, comparative judgment is prevented. The results nevertheless provide evidence on the overall relevance of scale economies within and across groups of economies, while also giving a clear indication of the relevance of stage of development in economic growth and development analysis.

The most fundamental insight of the empirical results presented in this paper is that there is no reason to assume that the determinants of growth or the parameters guiding economies' adjustments towards their steady states or growth paths will be similar for economies at different stages of development, given their significant structural differences, whether in terms of production structures and characteristics or consumption patterns.

This study proposes targeted modernization of the Department of Defense (DoD's) Joint Forces Ammunition Logistics information system by implementing the optimized innovative information technology open architecture design and integrating Radio Frequency Identification Device data technologies and real-time optimization and control mechanisms as the critical technology components of the solution. The innovative information technology, which pursues the focused logistics, will be deployed in 36 months at the estimated cost of $568 million in constant dollars. We estimate that the Systems, Applications, Products (SAP)-based enterprise integration solution that the Army currently pursues will cost another $1.5 billion through the year 2014; however, it is unlikely to deliver the intended technical capabilities.

An aggregate production function has been used in macroeconomic analysis for a long time, even though it seems that it is conceptually confusing and problematic. The purpose of this paper is to argue that the measurement problem related to the heterogenous capital input that exists in macroeconomics is also relevant to microeconomic market situations.

The author constructed a microeconomic market model to address both the problems of the measurement of the physical capital and of substitutability between labor and capital in the short run using two types of technologies: labor neutral and labor reducing. The author proposed that labor and physical capital inputs are complementary in the short run and can become substitutes only in the long run when the technology advances.

The author found that even if the technology improves at a fast rate over time, there are then diminishing returns of profits to technology and an upper limit to profits. Moreover, the author showed that under the labor-reducing technology, labor class earns more initially as technology improves, but their incomes start declining after some threshold level of passage of time.

The author cautioned the applied researcher that the estimated labor and capital coefficients of generalized Cobb–Douglas and constant elasticity of substitution of types of production functions could not be interpreted as partial elasticities of labor and capital if in reality the data come from fixed-proportions types of processes.

Recent studies have linked differences in aggregate productivity to misallocation of resources across firms. In contrast, the purpose of this paper is to study the macroeconomic performance of OECD economies from a production efficiency point of view and estimated the determinants of (in)efficiency with particular emphasis on misallocation of labor.

Following the pioneering work of Battese and Coelli, the authors proposed a parametric methodology to construct a world frontier that serves as a benchmark to compare the relative position of each country. The non-negative technical inefficiency effects are assumed to be a function of explanatory variables. By doing this, determinants of technical inefficiency are explicitly introduced in the model.

The results revealed that OECD countries to operate efficiently should expand their aggregate output by 22.6 percent without consuming more resources. A novel finding is that higher skill mismatch is associated with higher production inefficiency. Conversely, more flexible labor markets, and better management and human resource practices, lowered the inefficiency in production. The paper also analyzed the underlying factors driving skill misallocation in the job market. In this regard, a well-functioning education and training system and greater flexibility in the determination of wages are associated with lower levels of mismatch between the skills of individuals and those required by the jobs.

The measurement of the productive efficiency of an economy (or country) is crucial to governments. It is important to know how far a given economy can be expected to increase its output by simply increasing its efficiency, without absorbing further resources. In other words, it is relevant to know if a country could produce more with the same resources and, therefore, could increase per capita income and welfare. In this type of analysis what also matters is to identify what factors or variables explain that greater or lesser ability of a country to convert its resources into aggregate production.

Much research on efficiency measurement has focused on the firm or industry level, mainly to study the efficiency of financial institutions. Efficiency studies using aggregated data across countries are rare in the literature of efficiency. This paper aimed to contribute to filling that shortage evaluating the macroeconomic performance of a sample of OECD countries from the production efficiency point of view.

We examine the two-level nested constant elasticity of substitution production function where both capital and labor are disaggregated in two classes. We propose a normalized system estimation method to retrieve estimates of the inter- and intra-class elasticities of substitution and factor-augmenting technical progress coefficients. The system is estimated for US data for the 1963–2006 period. Our findings reveal that skilled and unskilled labor classes are gross substitutes, capital structures and equipment are gross complements, and aggregate capital and aggregate labor are gross complements with an elasticity of substitution close to 0.5. We discuss the implications of our findings and methodology for the analysis of the causes of the increase in the skill premium and, by implication, inequality in a growing economy.

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.

There is growing empirical evidence that firm heterogeneity is technologically non-neutral. This chapter extends the Gandhi, Navarro, and Rivers (2020) proxy variable framework for structurally identifying production functions to a more general case when latent firm productivity is multi-dimensional, with both factor-neutral and (biased) factor-augmenting components. Unlike alternative methodologies, the proposed model can be identified under weaker data requirements, notably, without relying on the typically unavailable cross-sectional variation in input prices for instrumentation. When markets are perfectly competitive, point identification is achieved by leveraging the information contained in static optimality conditions, effectively adopting a system-of-equations approach. It is also shown how one can partially identify the non-neutral production technology in the traditional proxy variable framework when firms have market power.

This study investigates the nature of the substitutability relationships among capital, labor, and imported inputs in the context of a production function for Spain, with estimates obtained from an aggregate cost function. The results are consistent with the hypothesis that all of the inputs are substitutes for one another. The findings with respect to domestic inputs and imports are particularly important as the internationalization of the Spanish economy continues since, in the short run and ceteris paribus, further removal of import restrictions may have a negative impact on the demand for domestic factors. The estimates obtained here are also consistent with the hypotheses that: a decrease in the price of imports will have a proportionately larger impact on the price of domestically‐produced investment goods than on consumption goods; and second, that the elasticity of demand for each input with respect to consumption goods production is considerably higher than for investment goods production.