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Articles 1 - 30 of 76
Full-Text Articles in Physical Sciences and Mathematics
Cnh: Fine-Scale Dynamics Of Human Adaptation In Coupled Natural And Social Systems: An Integrated Computational Approach Applied To Three Fisheries, James A. Wilson, James Acheson, Robert Steneck, Yong Chen, Teresa R. Johnson
Cnh: Fine-Scale Dynamics Of Human Adaptation In Coupled Natural And Social Systems: An Integrated Computational Approach Applied To Three Fisheries, James A. Wilson, James Acheson, Robert Steneck, Yong Chen, Teresa R. Johnson
University of Maine Office of Research Administration: Grant Reports
The purpose of this project is to gain a better understanding of the way competition between individual fishermen lead to the emergence of private incentives and informal social arrangements that are (or are not) consistent with conservation of the resource. These informal arrangements and incentives are important because they help us understand the extent to which private interests might strengthen or weaken on-going resource management and, consequently, the sustainability of coupled human and natural systems. The broad hypothesis driving the study is that the informal social structure that emerges from competitive interactions among fishermen reflects the particular circumstances of the …
Tvet As An Important Factor In Country’S Economic Development, Margarita Pavlova
Tvet As An Important Factor In Country’S Economic Development, Margarita Pavlova
Practical Social and Industrial Research Symposium
In this keynote speech, Dr Pavlova will bring together a number of strategic development areas for Hong Kong as stated in the 2014 Chief Executive’s Policy Address. These areas include economic development, innovation and technology industries, vocational education and environmental protection.
An Optimal Harvesting Strategy Of A Three Species Syn-Ecosystem With Commensalism And Stochasticity, M. N. Srinivas, A. Sabarmathi, K. S. Reddy, M. A. S. Srinivas
An Optimal Harvesting Strategy Of A Three Species Syn-Ecosystem With Commensalism And Stochasticity, M. N. Srinivas, A. Sabarmathi, K. S. Reddy, M. A. S. Srinivas
Applications and Applied Mathematics: An International Journal (AAM)
In this paper we have studied the stability of three typical species syn-ecosystem. The system comprises of one commensal S1 and two hosts S2 and S3 . Both S2 and S2 benefit S1 without getting themselves affected either positively or adversely. Further S2 is a commensal of S3 and S3 is a host of both S1 and S2. Limited resources have been considered for all the three species in this case. The model equations of the system constitute a set of three first order non-linear ordinary differential equations. …
Firm-Level Productivity Spillovers In China’S Chemical Industry: A Spatial Hausman-Taylor Approach, Peter H. Egger, Badi H. Baltagi, Michaela Kesina
Firm-Level Productivity Spillovers In China’S Chemical Industry: A Spatial Hausman-Taylor Approach, Peter H. Egger, Badi H. Baltagi, Michaela Kesina
Center for Policy Research
This paper assesses the role of intra-sectoral spillovers in total factor productivity across Chinese producers in the chemical industry. We use a rich panel data-set of 12,552 firms observed over the period 2004-2006 and model output by the firm as a function of skilled and unskilled labor, capital, materials, and total factor productivity, which is broadly defined. The latter is a composite of observable factors such as export market participation, foreign as well as public ownership, the extent of accumulated intangible assets, and unobservable total factor productivity. Despite the richness of our data-set, it suffers from the lack of time …
Empirical Studies On Interest Rate Derivatives, Xudong Sun
Empirical Studies On Interest Rate Derivatives, Xudong Sun
UNLV Theses, Dissertations, Professional Papers, and Capstones
Interest rate models are the building blocks of financial market and the interest rate derivatives market is the largest derivatives market in the world. In this dissertation, we shall focus on numerical pricing of interest rate derivatives, estimating model parameters by Kalman filter, and studying various models empirically. We shall propose a front-fixing finite element method to price the American put option under the quadratic term structure framework and compare it with a trinomial tree method and common finite element method. Numerical test results show the superiority of our front-fixing finite element method in the aspects of computing the option …
Top Of The Order: Modeling The Optimal Locations Of Minor League Baseball Teams, W. Coleman Conley
Top Of The Order: Modeling The Optimal Locations Of Minor League Baseball Teams, W. Coleman Conley
Undergraduate Economic Review
Over the last twenty-five years, minor league baseball franchises have defined firm mobility. Revisiting the work of Michael C. Davis (2006), I construct a logistic regression model to predict which cities house minor league baseball teams. Six variables are tested for inclusion in the model, including population, income level, the number of major-league professional sports teams in a city, five-year population change, and distance from the closest professional team. Based on the model's predicted probabilities, cities are ranked in order of highest probability of having a team at each of the different levels from Class A to Class AAA.
Energy Production, Distribution, And Pollution Controls: Combining Engineering And Economic Analysis To Enhance Efficiency And Policy Design, David F. Perkis
Energy Production, Distribution, And Pollution Controls: Combining Engineering And Economic Analysis To Enhance Efficiency And Policy Design, David F. Perkis
Open Access Dissertations
Three published articles are presented which focus on enhancing various aspects of the energy supply chain. While each paper adopts a different methodology, all three combine engineering data and/or techniques with economic analysis to improve efficiency or policy design within energy markets. ^ The first paper combines a chemical engineering plant design model with an economic assessment of product enhancements within an ethanol production facility. While a new chemical process is shown to achieve greater ethanol yields, the animal feed by-products are denatured and decrease in value due to the degradation of a key nutritional amino acid. Overall, yield increases …
Land Rights Among Subsistence Farmers: An Examination Of Madagascar’S Land Reform And Prevailing Systems Of Land Tenure In Betafo, Taylor Crowl
Independent Study Project (ISP) Collection
In Madagascar, legal systems of land tenure have been inaccessible for the vast majority of the rural population. This has stranded millions of subsistence farmers in a sense of insecurity, as they lack legal rights for the property that they have farmed for generations. Madagascar’s land reform, launched in 2005, attempted to change these exclusionary tenure practices. This reform —known as the Plan National Foncier—created land certificates and local land offices in an attempt to make legal land tenure financially, geographically, and logistically accessible to the local population. This study discusses the successes, failures, and unforeseen consequences of Madagascar’s land …
Planetary Improvement: Discourses And Practices Of Green Capitalism In The Cleantech Space, Jesse Adam Goldstein
Planetary Improvement: Discourses And Practices Of Green Capitalism In The Cleantech Space, Jesse Adam Goldstein
Dissertations, Theses, and Capstone Projects
There is money to be made in saving the planet. A whole host of actors, such as investors, entrepreneurs, engineers, and policy makers have mobilized around our ecological problems, seeking to innovate new `green' and `clean' technologies that can serve a rapidly changing environment. The presumption that such technologies are both necessary and necessarily profitable anchors visions of a `green' capitalism that can and must be brought into existence.
However, just as free markets have never been all that free, why should we presume that green capitalism would be all that green? Instead of attempting to arbit whether or not …
The Effect Of Income On Health After Hurricane Katrina, Jang Wook Lee
The Effect Of Income On Health After Hurricane Katrina, Jang Wook Lee
Dissertations, Theses, and Capstone Projects
There is a large literature that documents a positive correlation between income and a variety of measures of good health. This correlation may reflect causality in both directions and may also reflect omitted "third variables" that are positively related to income and health. In my dissertation, I employ an exogenous negative shock to income due to a natural disaster to estimate the true causal impact of income on health. The shock I will use is Hurricane Katrina, which severely damaged counties in Alabama, Mississippi, and Louisiana in August 2005. I use these treatment counties and a variety of alternative sets …
Improving Social Resilience In Response To Climate Change In Far North Queensland And Torres Strait, Katie Costantini
Improving Social Resilience In Response To Climate Change In Far North Queensland And Torres Strait, Katie Costantini
Independent Study Project (ISP) Collection
Currently, most approaches to decision-making in response to climate change have been based on biophysical knowledge, even though climate change is an inherently social dilemma. Social resilience involves communities’ ability to mitigate and prepare for the effects of climate change and recover to an improved state. Professor Allan Dale and his colleagues at the Cairns Institute at James Cook University developed a framework for social resilience based on four attributes: (1) Economic Viability, (2) Community Knowledge, Aspirations, and Capacity, (3) Community Vitality, and (4) Governance. They are using this framework to evaluate and monitor Far North Queensland and Torres Strait …
Promoting Renewable Energy Generation In The United States: The Debate Over Renewable Portfolio Standards, Joe Cerne
Economics Theses
Incentivizing renewable energy growth in the 21st century is, and will continue to be, a highly debated topic. As of late, legislative initiatives have prompted the enactment of various renewable portfolio standards aimed at stimulating renewable energy growth. Using data regarding each state’s energy production, this paper finds that there is no significant change in renewable energy output following the initiation of a renewable portfolio standard. We conclude that renewable energy growth is virtually unaffected by renewable portfolio standards and as such, we agree with much of the literature implying other means are necessary in order to adequately shift …
欠測値補定の診断手法としての多重代入法(高橋将宜), Masayoshi Takahashi
欠測値補定の診断手法としての多重代入法(高橋将宜), Masayoshi Takahashi
Masayoshi Takahashi
No abstract provided.
Network Analysis Of World Trade Using The Baci-Cepii Dataset, Luca De Benedictis, Silvia Nenci, Gianluca Santoni, Lucia Tajoli, Claudio Vicarelli
Network Analysis Of World Trade Using The Baci-Cepii Dataset, Luca De Benedictis, Silvia Nenci, Gianluca Santoni, Lucia Tajoli, Claudio Vicarelli
Luca De Benedictis
In this paper we explore the BACI-CEPII database using Network Analysis. Starting from the visualization of the World Trade Network, we then define and describe the topology of the network, both in its binary version and in its weighted version, calculating and discussing some of the commonly used network’s statistics. We finally discuss some specific topic that can be studied using Network Analysis and International Trade data, both at the aggregated and sectoral level. The analysis is done using multiple software (Stata, R, and Pajek). The scripts to replicate part of the analysis are included in the appendix, and can …
The Development Pattern And Competitiveness Evaluation Research On China Inland Dry Port, Min Shi
The Development Pattern And Competitiveness Evaluation Research On China Inland Dry Port, Min Shi
World Maritime University Dissertations
No abstract provided.
Study On Volatility Of China Containerized Freight Index Based On Garch Family Model, Chen Yuan
Study On Volatility Of China Containerized Freight Index Based On Garch Family Model, Chen Yuan
World Maritime University Dissertations
No abstract provided.
Study On Factors Influencing Coal Freight Rate Based On Var Model, Junyi Liu
Study On Factors Influencing Coal Freight Rate Based On Var Model, Junyi Liu
World Maritime University Dissertations
No abstract provided.
Analysis Of Influencing Factors Of Coastal Port Cargo Throughput In China From Economic Aspect, Hongyi Zhang
Analysis Of Influencing Factors Of Coastal Port Cargo Throughput In China From Economic Aspect, Hongyi Zhang
World Maritime University Dissertations
No abstract provided.
Research On China Newbuilding Price Index And Its Derivatives, Yangyang Zhang
Research On China Newbuilding Price Index And Its Derivatives, Yangyang Zhang
World Maritime University Dissertations
No abstract provided.
Research On Correlation Effects Between Tianjin Port And Its Inland Ports Based On Modified Gravity Model, Yayun Zhao
Research On Correlation Effects Between Tianjin Port And Its Inland Ports Based On Modified Gravity Model, Yayun Zhao
World Maritime University Dissertations
No abstract provided.
Research On Price Fluctuation And Investment Efficiency Of Newbuilding Dry Bulk Carrier, Xinshu Zhou
Research On Price Fluctuation And Investment Efficiency Of Newbuilding Dry Bulk Carrier, Xinshu Zhou
World Maritime University Dissertations
No abstract provided.
On Sign-Solvable Linear Systems And Their Applications In Economics, Eric Hanson
On Sign-Solvable Linear Systems And Their Applications In Economics, Eric Hanson
Journal of Undergraduate Research at Minnesota State University, Mankato
Sign-solvable linear systems are part of a branch of mathematics called qualitative matrix theory. Qualitative matrix theory is a development of matrix theory based on the sign (¡; 0; +) of the entries of a matrix. Sign-solvable linear systems are useful in analyzing situations in which quantitative data is unknown or had to measure, but qualitative information is known. These situations arise frequently in a variety of disciplines outside of mathematics, including economics and biology. The applications of sign-solvable linear systems in economics are documented and the development of new examples is formalized mathematically. Additionally, recent mathematical developments about sign-solvable …
Municipal Recycling In Waterville: A Choice Experiment, Katharine V. Eddy, Alec A. Finigan
Municipal Recycling In Waterville: A Choice Experiment, Katharine V. Eddy, Alec A. Finigan
Journal of Environmental and Resource Economics at Colby
The city of Waterville, Maine has experienced many struggles with establishing an economically and socially beneficial method for collecting recyclables from residents. In 2006, the town made the choice to terminate its curbside recycling pickup and open the Skills facility, where residents were able to transport there recyclables and dispose of them at the facility. This proved to also not be economically beneficial and the town ended this option for residents in 2012. The motivation behind establishing a new recycling program in Waterville is making Waterville more environmentally friendly, the creation of jobs for residents in the trash collecting business, …
Rescuing Economics From The Discipline: The Green Learning Community, Michael Daley, Owen Grumbling, Richard B. Peterson
Rescuing Economics From The Discipline: The Green Learning Community, Michael Daley, Owen Grumbling, Richard B. Peterson
Business Faculty Publications
Undergraduate economics is poised for reform because of readily available data and multimedia content. However, we argue that deep reform is needed to teach complex contemporary problems. This requires including institutional and historical content and restructuring the classroom to facilitate interdisciplinary pedagogy. Using Colander’s (2006) analysis of reform as a starting point, we review the economics literature to identify alternative approaches and interdisciplinary pedagogy. The Green Learning Community is introduced as an intentional approach that links economics, humanities and environmental studies and provides first-year students adequate time to study, reflect upon, and internalize economic assumptions, models, values, and interdisciplinary insights.
Asimmetria Del Rischio Sistematico Dei Titolo Immobiliari Americani: Nuove Evidenze Econometriche, Paola De Santis, Carlo Drago
Asimmetria Del Rischio Sistematico Dei Titolo Immobiliari Americani: Nuove Evidenze Econometriche, Paola De Santis, Carlo Drago
Carlo Drago
In questo lavoro riscontriamo un aumento del rischio sistematico dei titoli del mercato immobiliare americano nell’anno 2007 seguito da un ritorno ai valori iniziali nell’anno 2009 e si evidenzia la possibile presenza di break strutturali. Per valutare il suddetto rischio sistematico è stato scelto il modello a tre fattori di Fama e French ed è stata studiata la relazione tra l’extra rendimento dell’indice REIT, utilizzato come proxy dell’andamento dei titoli immobiliari americani, e l’extra rendimento dell’indice S&P500 rappresentativo del rendimento del portafoglio di mercato. I risultati confermano la presenza di un “Asymmetric REIT Beta Puzzle” coerentemente con alcuni precedenti studi …
Options Pricing And Hedging In A Regime-Switching Volatility Model, Melissa A. Mielkie
Options Pricing And Hedging In A Regime-Switching Volatility Model, Melissa A. Mielkie
Electronic Thesis and Dissertation Repository
Both deterministic and stochastic volatility models have been used to price and hedge options. Observation of real market data suggests that volatility, while stochastic, is well modelled as alternating between two states. Under this two-state regime-switching framework, we derive coupled pricing partial differential equations (PDEs) with the inclusion of a state-dependent market price of volatility risk (MPVR) term.
Since there is no closed-form solution for this pricing problem, we apply and compare two approaches to solving the coupled PDEs, assuming constant Poisson intensities. First we solve the problem using numerical solution techniques, through the application of the Crank-Nicolson numerical scheme. …
Measuring Gender Difference In Information Sharing Using Network Analysis: The Case Of The Austrian Interlocking Directorship Network In 2009, Carlo Drago, Livia Amidani Aliberti, Davide Carbonai
Measuring Gender Difference In Information Sharing Using Network Analysis: The Case Of The Austrian Interlocking Directorship Network In 2009, Carlo Drago, Livia Amidani Aliberti, Davide Carbonai
Carlo Drago
In recent literature a relevant problem has been the relationship between career/personal contact networks and different career paths. In addition the recent advances in social capital theory have shown the way in which networks impact on personal careers. In particular women’s careers appear to be negatively affected by the informational network structure. The main contribution of this work is to propose empirical evidence of this phenomenon by considering the gendered directorship network with relation to Austria and to show the structural differences by gender in the network. By using community detection techniques we have found various communities in which females …
Test Of Hypotheses In A Time Trend Panel Data Model With Serially Correlated Error Component Disturbances, Chihwa Kao, Badi H. Baltagi, Long Liu
Test Of Hypotheses In A Time Trend Panel Data Model With Serially Correlated Error Component Disturbances, Chihwa Kao, Badi H. Baltagi, Long Liu
Center for Policy Research
This paper studies test of hypotheses for the slope parameter in a linear time trend panel data model with serially correlated error component disturbances. We propose a test statistic that uses a bias corrected estimator of the serial correlation parameter. The proposed test statistic which is based on the corresponding fixed effects feasible generalized least squares (FE-FGLS) estimator of the slope parameter has the standard normal limiting distribution which is valid whether the remainder error is I(0) or I(1). This performs well in Monte Carlo experiments and is recommended.
Global Economic Impacts Of Shoreline Degradation: A Socioeconomic Analysis, Alexa Brockamp
Global Economic Impacts Of Shoreline Degradation: A Socioeconomic Analysis, Alexa Brockamp
Global Honors Theses
Shoreline Degradation is an economically important issue, which damages coastal tourism economies, and causes shifts in flows of tourist capital. Shifts in flows of tourist capital have the potential to cause shifts in economic power relationships between nations. Governments and planning agencies should acknowledge the inherent dependence of coastal tourism economies on shoreline health and water quality, and conceptions framing the two issues as dichotomous are destructive – causing urban decisions to be made as if environmental and economic interests are mutually exclusive. It is important that such perceptions shift in order to maintain healthy coastal economies. Additionally, the socio- …
An Empirical Exploration Of The Effects Of Natural Gas Prices On Solar Energy Growth, Jeffrey Walton
An Empirical Exploration Of The Effects Of Natural Gas Prices On Solar Energy Growth, Jeffrey Walton
Economics Theses
This paper analyzes the relationship between natural gas prices and solar installation in the past ten years. The point is to explain how the fluctuations in natural gas prices have effected solar installation. Briefly, natural gas prices from three to five years ago have a positive coefficient on solar installation in the current period, meaning that as the natural gas price three to five years ago increases, solar installation today increases. In course of the analysis, we find that the Goldilocks theory holds true and a natural gas price range from $4 to $6 leads to the highest level of …