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Author: Alisson Brito Publisher: BoD – Books on Demand ISBN: 9537619680 Category : Computers Languages : en Pages : 304
Book Description
When talking about modelling it is natural to talk about simulation. Simulation is the imitation of the operation of a real-world process or systems over time. The objective is to generate a history of the model and the observation of that history helps us understand how the real-world system works, not necessarily involving the real-world into this process. A system (or process) model takes the form of a set of assumptions concerning its operation. In a model mathematical and logical assumptions are considered, and entities and their relationship are delimited. The objective of a model – and its respective simulation – is to answer a vast number of “what-if” questions. Some questions answered in this book are: What if the power distribution system does not work as expected? What if the produced ships were not able to transport all the demanded containers through the Yangtze River in China? And, what if an installed wind farm does not produce the expected amount of energyt? Answering these questions without a dynamic simulation model could be extremely expensive or even impossible in some cases and this book aims to present possible solutions to these problems.
Author: Alisson Brito Publisher: BoD – Books on Demand ISBN: 9537619680 Category : Computers Languages : en Pages : 304
Book Description
When talking about modelling it is natural to talk about simulation. Simulation is the imitation of the operation of a real-world process or systems over time. The objective is to generate a history of the model and the observation of that history helps us understand how the real-world system works, not necessarily involving the real-world into this process. A system (or process) model takes the form of a set of assumptions concerning its operation. In a model mathematical and logical assumptions are considered, and entities and their relationship are delimited. The objective of a model – and its respective simulation – is to answer a vast number of “what-if” questions. Some questions answered in this book are: What if the power distribution system does not work as expected? What if the produced ships were not able to transport all the demanded containers through the Yangtze River in China? And, what if an installed wind farm does not produce the expected amount of energyt? Answering these questions without a dynamic simulation model could be extremely expensive or even impossible in some cases and this book aims to present possible solutions to these problems.
Author: Shailesh Shrestha Publisher: CABI ISBN: 1780644280 Category : Science Languages : en Pages : 240
Book Description
Agriculture is the product of a complex mixture of behavioural, biophysical and market drivers. Understanding how these factors interact to produce crops and livestock for food has been the focus of economic investigation for many years. The advent of optimisation algorithms and the exponential growth in computing technology has allowed significant growth in mathematical modelling of the dynamics of agricultural systems. The complexity of approaches has grown in parallel with the availability of data at increasingly finer resolutions. Farm-level models have been widely used in agricultural economic studies to understand how farmers and land owners respond to market and policy levers. This book provides an in-depth description of different methodologies and techniques currently used in farm-level modelling. While giving an overview of the theoretical grounding behind the models, an applied approach is also used. Case studies range from the application of modelling to policy reforms and the subsequent impacts on rural communities and food supply. This book also provides descriptions of the use of farm-level models in much wider fields such as aggregation and linking with sectoral models. Its purpose is to show the reader the methods that have been employed to inform decision-makers about how to improve the economic, social and environmental goals required to achieve the aims of multidimensional policy.
Author: H.J. Bremmers Publisher: BRILL ISBN: 9086865267 Category : Business & Economics Languages : en Pages : 630
Book Description
"Companies in food- and agribusiness chains and networks are facing ever-faster changes in the business environment, to which they must respond through continuous innovation. Societal concerns regarding animal welfare and environmental issues have to be met in a very competitive, increasingly global environment. The growing concern of consumers regarding the quality, traceability and environmental friendliness of products and processes call for fundamentally new ways of developing, producing and marketing products. New ways of organizing food supply networks, with new ties between firms and even between formerly separate sectors -such as the health and the food sector- are needed to cope with these new demands. This publication focusses on the dynamic response to these changes in chains and networks. Important topics include among others: critical success factors for design and control of innovative chains and networks, globalization of the business environment, effects of institutional and policy change, governance structures, technologies for managing interaction and design of information architectures for chains and networks."
Author: Nik. K. Baltas Publisher: Nova Publishers ISBN: 9781590336113 Category : Business & Economics Languages : en Pages : 126
Book Description
The food and drinks sectors occupy the first place in Greek manufacturing industry. The share of food and drinks in total manufacturing industry value added reached 24.7 per cent in 1998. The average size of employment in food and drinks establishments is 5.2 persons per unit and is similar to that for manufacturing industry in general (4.9). Exports and imports of food and drinks increased during the 1980-95 period. However, imports increased faster than exports. As a result, the positive balance of trade turned negative. Although demand for food increased between 1980 and 1998, the share of private expenditure for food in total private expenditure decreased by 8.5 percentage points (thanks to correspondingly low elasticities). The corresponding share for drinks increased by one percentage point during the 1980-90 period and has remained constant since then. The aim of this book is to quantify Greek investors' behaviour at aggregate level for all sectors and all regions over the period 1981-1999, as well as at individual sector level. Investors' behaviour is examined by employing a synthesised traditional model. The traditional model is estimated using alternative panel data methods. First, the dynamic panel data model is estimated with a common intercept by employing the Generalised Method of Moments (GMM). The dynamic panel data formulation is also estimated using the Maximum Likelihood (ML) estimation technique.
Author: Wolfram Schlenker Publisher: University of Chicago Press ISBN: 022661980X Category : Business & Economics Languages : en Pages : 316
Book Description
Agricultural yields have increased steadily in the last half century, particularly since the Green Revolution. At the same time, inflation-adjusted agricultural commodity prices have been trending downward as increases in supply outpace the growth of demand. Recent severe weather events, biofuel mandates, and a switch toward a more meat-heavy diet in emerging economies have nevertheless boosted commodity prices. Whether this is a temporary jump or the beginning of a longer-term trend is an open question. Agricultural Productivity and Producer Behavior examines the factors contributing to the remarkably steady increase in global yields and assesses whether yield growth can continue. This research also considers whether agricultural productivity growth has been, and will be, associated with significant environmental externalities. Among the topics studied are genetically modified crops; changing climatic factors; farm production responses to government regulations including crop insurance, transport subsidies, and electricity subsidies for groundwater extraction; and the role of specific farm practices such as crop diversification, disease management, and water-saving methods. This research provides new evidence that technological as well as policy choices influence agricultural productivity.
Author: Marc Nerlove Publisher: Academic Press ISBN: 1483218880 Category : Business & Economics Languages : en Pages : 495
Book Description
Analysis of Economic Time Series: A Synthesis integrates several topics in economic time-series analysis, including the formulation and estimation of distributed-lag models of dynamic economic behavior; the application of spectral analysis in the study of the behavior of economic time series; and unobserved-components models for economic time series and the closely related problem of seasonal adjustment. Comprised of 14 chapters, this volume begins with a historical background on the use of unobserved components in the analysis of economic time series, followed by an Introduction to the theory of stationary time series. Subsequent chapters focus on the spectral representation and its estimation; formulation of distributed-lag models; elements of the theory of prediction and extraction; and formulation of unobserved-components models and canonical forms. Seasonal adjustment techniques and multivariate mixed moving-average autoregressive time-series models are also considered. Finally, a time-series model of the U.S. cattle industry is presented. This monograph will be of value to mathematicians, economists, and those interested in economic theory, econometrics, and mathematical economics.
Author: Kenneth H Baum Publisher: CRC Press ISBN: 0429705417 Category : Science Languages : en Pages : 441
Book Description
Microeconomic modeling has been an important tool for agricultural economists for several decades and promises to be important for ad-dressing the research problems of the 1980s as well. This volume explores the possibilities for using micromodeling to analyze how individual farm businesses react to and are affected by farm policies. Although this purpose represents only one potential use of micro-modeling, effective modeling for policy analysis necessitates a broad look from several historical, analytical, and institutional perspectives. The Micromodeling Conference held November 18-20, 1981, at Airlie House, Virginia, under the auspices of the U.S. Department of Agri-culture's Economic Research Service and the Farm Foundation reflected these concerns.
Author: Bekele Shiferaw Publisher: CABI ISBN: 0851998283 Category : Technology & Engineering Languages : en Pages : 398
Book Description
Part I: Introduction; Part II: Valuation of ecosystem services and biophysical indicators of NRM impacts; Part III: Methodological advances for a comprehensive impact assessment; Part IV: NRM impact assessment in practice.
Author: Alisson Brito
Author: Alisson Brito
Author: Shailesh Shrestha
Author: Ruth Vargas Hill
Author: H.J. Bremmers
Author: Nik. K. Baltas
Author: Wolfram Schlenker
Author: Marc Nerlove
Author: Kenneth H Baum
Author: 
Author: Bekele Shiferaw