Nataly Podolyakina

Bio: Nataly Podolyakina is an academic researcher from Transport and Telecommunication Institute. The author has contributed to research in topics: Warranty & Risk management plan. The author has an hindex of 2, co-authored 4 publications receiving 16 citations.

Product Reliability and Warranty Period as a Cost-Forming Factors

Abstract: The relevance of this study is determined by the fact that, in modern conditions, the manufacturers of high-tech products offer long-term warranty service for their products aiming at receiving the consumer. In turn, the frequency of warranty service depends on the probability of trouble-free operation of the product in a certain time interval. However, increasing the uptime of the products and increase the warranty period results in increased costs. Therefore, the purpose of this study is to develop a model that allows determining the impact of the following factors on the product cost: the reliability of the manufactured products and the term of their warranty. To achieve the goal of the research there has been determined the content of warranty service, has been introduced the integrated indicator of quality warranty services, and has been shown the level of products reliability as a dependence from the costs of their manufacturing and warranty service. The novelty of this study is estimation of the manufacturer's cost depending on the way of providing the warranty service, either by repair, or by complete replacement of the failed product. The research results provide competitive advantages to manufacturers of high-tech products since it enables to find the efficient period and intensity of the warranty service. Keywords cost structure warranty servicing warranty period reliability level probability of failure of the product unit cost JEL Classification M21 Introduction Every company is fighting for the consumer under the circumstances of modern market economy. To attract and retain consumers of their products, companies develop and offer a huge range of additional features that make the produced product more attractive. These features include favorable terms and conditions of payment, flexible system of discounts for customers, as well as a system of products warranty. The consequence of technical progress is the production of increasingly high-tech devices and mechanisms there are various requirements towards the level of their reliability. Consumers need assurance that the product will perform satisfactorily over the useful life of the product. There are many different aspects to warranty and these have been studied by researchers from many different disciplines. The higher the reliability requirements towards the product are, the higher the quality of warranty service is. In their turn, these aspects affect the manufacturer's costs. The warranty servicing costs vary from 2-10% of the sale price depending on the product and the manufacturer. As a result, warranty and product reliability are very important in the context of new product development (Deniaud et al. 2016). Reliability of a product conveys the concept of dependability, successful operation or performance and the absence of failures. It is an external property of great interest to both manufacturer and consumer. Unreliability (or lack of reliability) conveys the opposite. A more technical definition is the following: * The reliability of a product (system) is the probability that the product (system) will perform its intended function for a specified time period when operating under normal (or stated) environmental conditions (Blischke and Murthy 2000). * The reliability of a product gets determined by the decisions made during the pre-production stages (Front-end, Design, Development) and the production stage of the product life cycle (Murthy and Djamaludin 2002). Both warranty and reliability have received a lot of attention over the last fifty years (Murthi 2008). The area of warranty has been studied by researchers from many different areas such as economic, engineering, statistics and more. A number of techniques have been used as a method in solving warranty problem. In past few years, there has been an increased used of statistical methods instead of soft computing methods in warranty related applications. …

The Incidence and Persistence of Corruption in Economic Development

Abstract: Economic development and bureaucratic corruption are determined jointly in a dynamic general equilibrium model of growth, bribery and tax evasion. Corruption arises from the incentives of public and private agents to conspire in the concealment of information from the government. These incentives depend on aggregate economic activity which, in turn, depends on the incidence of corruption. The model produces multiple development regimes, transition between which may or may not occur. In accordance with recent empirical evidence, the relationship between corruption and development is predicted to be negative.

Mathematics for Economics and Finance: Mathematical models in economics

Abstract: Introduction In this book we use the language of mathematics to describe situations which occur in economics. The motivation for doing this is that mathematical arguments are logical and exact, and they enable us to work out in precise detail the consequences of economic hypotheses. For this reason, mathematical modelling has become an indispensable tool in economics, finance, business and management. It is not always simple to use mathematics, but its language and its techniques enable us to frame and solve problems that cannot be attacked effectively in other ways. Furthermore, mathematics leads not only to numerical (or quantitative ) results but, as we shall see, to qualitative results as well. A model of the market One of the simplest and most useful models is the description of supply and demand in the market for a single good. This model is concerned with the relationships between two things: the price per unit of the good (usually denoted by p ), and the quantity of it on the market (usually denoted by q ). The ‘mathematical model’ of the situation is based on the simple idea of representing a pair of numbers as a point in a diagram, by means of coordinates with respect to a pair of axes. In economics it is customary to take the horizontal axis as the q -axis, and the vertical axis as the p -axis.

The effect of corruption on carbon dioxide emissions and energy consumption in Tunisia

Abstract: Purpose The purpose of this paper is to evaluate the impact of corruption on the environmental quality in Tunisia. Indeed, the post-revolution period is characterized by a remarkable increase in the rates of corruption. Design/methodology/approach The direct and indirect effects of control corruption on economic growth and CO2 emissions in Tunisia have been examined using the autoregressive distributed lag (ARDL) cointegration framework among corruption, growth and CO2 emissions. Findings Results substantiate a positive and significant relationship between control of corruption and economic growth, a negative and significant relationship between control of corruption and environmental quality (CO2) and a negative and significant relationship between control of corruption and energy consumption. The findings suggest that while the control of corruption contributes to economic growth, its positive effect could be transposed indirectly via its impacts on environmental quality. Originality/value A strategy against corruption will reduce CO2 emissions; however, its positive effect on economic growth indirectly contributes to reverse this relationship.

Corrupción y desarrollo en China y América Latina

Abstract: There is no clear consensus on the effects of corruption in different economic dimensions, although it is normally perceived as harmful for variables such as growth or FDI. The aim of the paper is to determine the effect of corruption on human development in Latin America and China. The methodology employed is a static data panel with the Prais-Winsten transformation with corrected standard errors for correlated panels (PCSE), and dynamic panel data from the Generalized Method of Moments (GMM) and SYS-GMM, for 18 Latin American countries and China for the period 2001-2019. It is shown that corruption serves as a development constraint for most of the countries in the sample. However, for some countries like China, it is found that corruption has a positive effect. There is also a significant difference in the sensitivity of development to corruption among countries.

Corruption, Governance and Sustainable Development: A Panel Data Analysis

Abstract: vii-viii TABLE OF CONTENTS ix-xvi LIST OF TABLES xvii-xviii