This paper specifies and interprets those direct relations which exist between the dual concepts of complete controllabil-ity/observability (Kalman, 1960), on the one hand, and the con-cept of the regular technique of production (Schefold, 1971), on the other. Specifically, it shows, first, that...

The labour theory of value (LTV) is the cornerstone of the classical and Marxian political economy for it explains the creation and valuation of wealth in capitalist societies and it remains the chief analytical tool in investigating economic phenomena. In this respect macroscopic phenomena,...

The focus of this research is analysis and forecast for Egypt's energy resources of oil and natural gas. Running a risk of an oil shortage in the near term, Egypt's strategic energy resource should shift from oil to natural gas. Given an international energy market with high price variations for...

In the past environmental management practices have been based on disparate analysis of the impacts of pollutants on selected components of ecosystems. However, holistic analysis of emission reduction strategies is necessary to justify that actions taken to protect the environment would not...

The development of oil and gas extraction technologies, including hydraulic fracturing (fracking), has increased fossil fuel reserves in the US. Despite benefits, uncertainty over environmental damages has led to fracking bans, both permanent and temporary, in many jurisdictions. We develop a...

The aim of this study is to investigate how the diffusion of the new digital technologies (Economy 4.0-technologies) effects the magnitude and composition of employment in Austria. For this purpose, an input-output framework is adopted taking into account direct as well as indirect effects of...

This study examined the influence of the respondents’ socio-economic characteristics on their adoption of crop insurance schemes. Discriminant analysis based on the criteria values of standardized canonical coefficient and correlation matrix identified that educational level, farm size,...

Based on C.Bidard’s and E.Klimovsky’s “Switches and Fake switches in methods of production”, an attempt will be made to show if fake switch points (as named) are in fact, and opposite of what Bidard and Klimovsky claim, real switch points.

This paper deals with the problem of choosing techniques. When we refer to the problem of choosing techniques, we actually refer to choose from a set of given production processes-techniques -according to a specific criterion- the optimum one. The criteria which are going to be presented are the...

An aggregate measure of production efficiency involving crop and livestock enterprises is examined in the Selale and Ada regions of Ethiopia using Data Envelopment Analysis (DEA). In general, farmers in regions more suitable to crop production (Ada) tend to attain higher production efficiency...