Mathematical Models in Input-Output Economics

This paper describes the mathematical basis for input-output economics, the major types of models, and the underlying economic theory. The features of these models that make them especially well suited for understanding the connections between the economy and the environment are emphasized throughout. These include the dual physical and price representations and the representation of resource inputs as factors of production, whether they are priced or not. The basic static physical and price models are described, along with their major properties and associated databases. The most important approaches to analysis involve multipliers, decomposition, and scenario analysis. Going beyond the basic static framework requires the progressive closure of the model by making exogenous variables endogenous while maintaining simplicity, transparency, and the distinctive feature of an input-output model: the simultaneous determination of solutions at the sectoral level and the economy-wide level. Closures for household activities and for investment are described by way of example. The major extensions of the basic model accommodate the representation of pollutant emissions and policies for constraining them, dynamic models, and multi-regional models, the latter including a new version of a world model that solves for bilateral trade flows and region-specific prices based on comparative advantage with factor constraints. The concluding section describes the challenges currently being addressed within the field. An annotated bibliography provides references for further reading and includes both classic articles and a representation of recent research.

NASA participation in the AMST program

The objectives of the NASA Advanced Medium STOL Transport Experiments Program are discussed and several of the NASA experiments currently implemented and conducted on the YC-14 and YC-15 prototype aircraft are described. Emphasis is placed on experiments related to powered lift aerodynamics and acoustics

An exponential Diophantine equation related to the difference between powers of two consecutive Balancing numbers

In this paper, we find all solutions of the exponential Diophantine equation $B_{n+1}^x-B_n^x=B_m$ in positive integer variables $(m, n, x)$, where $B_k$ is the $k$-th term of the Balancing sequence.Comment: Comments are welcom

Educational values and accountability in Tennessee : ethical dilemmas and moral imperatives

This case study focused on selected stakeholders\u27 perceptions of the appropriateness and effectiveness of the accountability policy system in Tennessee and how they perceive that accountability has affected them as differential groups. Standpoint Theory and policy literature provided the conceptual framework for the study. Sixty participants from six schools in three school districts, state level educators, and state level politicians were interviewed for this study. The Findings revealed that the state level educators and politicians perceive that the current accountability policy system is an appropriate and effective way to measure student achievement. However, the majority of educators perceive that they have been marginalized by the current accountability policy system. They do not perceive that relying solely on one standardized test is an appropriate and effective way of measuring student achievement. Teachers perceive that students do not take the tests seriously, and tensions exist among educators over the perceived inequities of not testing all students and not requiring value added gain scores for all teachers. Except on the high school Gateway and End of Course Exams, educators perceive that the tests are not closely aligned with the curriculum. Teachers and district level educators acknowledge unethical behaviors such as cheating to inflate scores and teaching to the tests

The information-seeking experience of users in the reference section of the Rowan University library

The purpose of this study was to learn about the information-seeking experience of users of the Rowan University library. The data were collected by way of a self-administered questionnaire. One hundred and five library users participated in the study; the average respondents were male undergraduates 18-22 years old. The data were analyzed by examining the percentages of responses. One major finding of the study is that 92% of the respondents did not think they needed the help of the librarian to use electronic resources. Another relevant finding was that users found one-on-one assistance from a librarian was more effective than bibliographic instruction in learning to conduct research independently. This study revealed some shared characteristics and patterns of the experiences of the respondents

Alien Registration- Smith, Faye E. (Hampden, Penobscot County)

https://digitalmaine.com/alien_docs/8228/thumbnail.jp

Reduction of tilt rotor download using circulation control

The effect of boundary layer control blowing on the download of a wing in the wake of a hovering rotor was measured in a small scale experiment. The objective was to evaluate the potential of boundary layer control blowing for reducing tilt rotor download. Variations were made in rotor thrust coefficient, blowing pressure ratio, and blowing slot height. The effect of these parameter variations on the wing download and wing surface pressures is presented. The boundary layer control blowing caused reductions in the wing download of 25 to 55 percent

Mathematical Models in Input-Output Economics

This paper describes the mathematical basis for input-output economics, the major types of models, and the underlying economic theory. The features of these models that make them especially well suited for understanding the connections between the economy and the environment are emphasized throughout. These include the dual physical and price representations and the representation of resource inputs as factors of production, whether they are priced or not. The basic static physical and price models are described, along with their major properties and associated databases. The most important approaches to analysis involve multipliers, decomposition, and scenario analysis. Going beyond the basic static framework requires the progressive closure of the model by making exogenous variables endogenous while maintaining simplicity, transparency, and the distinctive feature of an input-output model: the simultaneous determination of solutions at the sectoral level and the economy-wide level. Closures for household activities and for investment are described by way of example. The major extensions of the basic model accommodate the representation of pollutant emissions and policies for constraining them, dynamic models, and multi-regional models, the latter including a new version of a world model that solves for bilateral trade flows and region-specific prices based on comparative advantage with factor constraints. The concluding section describes the challenges currently being addressed within the field. An annotated bibliography provides references for further reading and includes both classic articles and a representation of recent research