Economics 21

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  OPTIMISATION OF TRANSPORTATION COSTS FOR DELIVERY OF HOMOGENOUS COMMODITY TO CONSUMERS ALONG THE LOGISTICS CHAIN

  This study examines some issues related to the mathematical modeling of shipment activities for homogenous products along the logistics chain and the economic-mathematical analysis of possibilities for its optimization. To this end, economic and mathematical models are suggested for the efficient management of transportation costs and costs ... This study examines some issues related to the mathematical modeling of shipment activities for homogenous products along the logistics chain and the economic-mathematical analysis of possibilities for its optimization. To this end, economic and mathematical models are suggested for the efficient management of transportation costs and costs arising in result of failure to meet the demand of certain consumers. Special attention has been paid to linear and non-linear models in an attempt to formalize the subjective attitude of managers in result of the objective impact of potential losses or the priority given to them due to the shortage of the output to be delivered. The practical need of and the options for applying the proposed economic-mathematical models are presented through comparative analysis and identifying the advantages of certain models through theoretical results based on a specific example from real business practice, which is evidence of their practical significance.

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  ANALYSIS OF THE AUTODETERMINATION COEFFICIENT STATISTICAL SIGNIFICANCE

  The study examines the issue of estimating the statistical signifi¬can¬ce of the autodetermination coefficient. The features of the proposed estimate are identified – bias, efficiency, consistency and sufficiency, and their relation¬ship with the length of the time series and the number of the autocorrelation coeffi¬cients used. Two approaches are ... The study examines the issue of estimating the statistical signifi¬can¬ce of the autodetermination coefficient. The features of the proposed estimate are identified – bias, efficiency, consistency and sufficiency, and their relation¬ship with the length of the time series and the number of the autocorrelation coeffi¬cients used. Two approaches are proposed for testing the statistical signifi¬can¬ce hypothesis. The first one is used in long time series and involves calcu¬lating the properties of the Wald test (W), the likelihood ratio test (LR) and the Lagrange multiplier test (LM). The second approach is used in short time series on the basis of tabulated boundary values of the autodetermination coeffi¬cient. The study proposes an analysis scheme which was used in stu¬dying the time series of the main indicators of Bulgaria’s demographic develop¬ment for the period 1930 – 2011.

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  SEQUENTIAL MARKETS AND GENERAL EQUILIBRIUM

  An increasing number of analysts of the latest financial crisis employ arguments and models from different stages of the evolution of economics. We believe that this is the right approach, since no economic event, financialization included, should be viewed as unique or unparalleled. We agree that the answers to most questions relating to the ... An increasing number of analysts of the latest financial crisis employ arguments and models from different stages of the evolution of economics. We believe that this is the right approach, since no economic event, financialization included, should be viewed as unique or unparalleled. We agree that the answers to most questions relating to the boom-downturn cycle are to be sought in the behaviour of entities involved in the economic process and the so-called extrinsic uncertainty. It seems only logical that similar events should be considered extreme and uncontrollable varieties of typical deviations from normal conditions. Yet, it might prove to be rather misleading to randomly combine economic concepts. Therefore, this paper is an attempt to systematize alternative models of the dynamic equilibrium path around which balanced and sometimes dis-balanced markets temporarily converge. In the framework presented here, extrinsic uncertainty and institutional theory add to the neo-classical idea about markets through the generalizing concept of market disequilibrium.