Lattice-Theoretic Foundations of the Consumer's Problem.

This paper provides an introduction to and discussion of the application of lattice-theoretic methods to classic problems in consumer theory. General characterizations of income effects with two goods, and with an arbitrary number of goods, as well as examples of comparative statics over densities and consumer types are also presented.consumer's problem; income effects; lattice programming; super-extremal

Comparative risk aversion of different preferences

Working paper GATE 2011-19An article about Kihlstrom and Mirman about comparative risk aversion with many goods is critiqued. If "more risk averse" is interpreted as signifying that an individual is less willing to accept a median-preserving spread, then risk aversion cannot be compared across individuals with different preferences. If it is interpreted as signifying that an individual has a greater directional risk premium, then risk aversion may be compared across individuals with different preferences, in particular in partial equilibrium analysis

Status Report on Sustainable Airports in the United States: Case Study of Chicago O\u27Hare International Airport

Sustainable policies affect the future of the environment. Airports across the country are focusing on sustainable airport planning to create a sustainable future for aviation by concentrating on the economic, social, and environmental impacts of aviation. Research is conducted through a literature review of sustainable airport planning and conducting a case study of Chicago O’Hare International Airport. Trends relating to sustainable airport planning are described, as well as current and future trends at Chicago O’Hare International Airport. Sources include the City of Chicago’s Department of Aviation and the Federal Aviation Administration, along with other books and scholarly articles. Chicago O’Hare International Airport is a leader in sustainable airport planning through the O’Hare Modernization Program and the Sustainable Airport Manual. Economics play a key role in sustainable airport planning

On the Timing of Vertical Relationships

We show that the standard analysis of vertical relationships transposes directly to investment timing. Thus, when a firm undertaking a project requires an outside supplier (e.g. an equipment manufacturer) to provide it with a discrete input, and if the supplier has market power, investment occurs too late from an industry standpoint. The distortion in firm decisions is characterized by a Lerner index, which is related to the parameters of a stochastic downstream demand. When feasible, vertical restraints restore efficiency. For instance, the upstream firm can induce entry at the correct investment threshold by selling a call option on the input. Otherwise, competition may substitute for vertical restraints. In particular, if two firms are engaged in a preemption race downstream, the upstream firm sells the input to the first investor at a discount that is chosen in such a way that the race to preempt exactly offsets the vertical externality, and this leader invests at the optimal market threshold.

Comparative risk aversion of different preferences

An article about Kihlstrom and Mirman about comparative risk aversion with many goods is critiqued. If "more risk averse" is interpreted as signifying that an individual is less willing to accept a median-preserving spread, then risk aversion cannot be compared across individuals with different preferences. If it is interpreted as signifying that an individual has a greater directional risk premium, then risk aversion may be compared across individuals with different preferences, in particular in partial equilibrium analysis.risk aversion, risk premium

Coordination and Cooperation in Investment Timing with Externalities ?

We characterize sequential (preemption) and simultaneous (coordination) equilibria, as well as joint-value maximizing (cooperation) solutions, in a model of investment timing allowing for externalities in both flow pro...ts and investment costs. For two ex-ante symmetric ...rms, either preemption or attrition occur depending on the size of the investment externality. Coordination is less likely with more discounting, as in a repeated game, and more likely with higher growth and volatility. Optimal cooperation involves either monopoly or duopoly investment, the latter being either symmetric or asymmetric. Finally, these characterizations are validated by applications to standard speci...cations of capacity accumulation and of R&D investment. In the former setup, coordination is likelier if installed capacities and lumpy investments are both large. With R&D input choices, if investment synergies are large, coordination and cooperation result in the same outcomes.Investment Timing; Real Options; Simultaneous Equilibrium; Joint-Value Maximization; Cooperation; Investment Externalities

An empirical study of multidimensional fidelity of COMPASS consultation

Consultation is essential to the daily practice of school psychologists (National Association of School Psychologist, 2010). Successful consultation requires fidelity at both the consultant (implementation) and consultee (intervention) levels. We applied a multidimensional, multilevel conception of fidelity (Dunst, Trivette, & Raab, 2013) to a consultative intervention called the Collaborative Model for Promoting Competence and Success (COMPASS) for students with autism. The study provided 3 main findings. First, multidimensional, multilevel fidelity is a stable construct and increases over time with consultation support. Second, mediation analyses revealed that implementation-level fidelity components had distant, indirect effects on student Individualized Education Program (IEP) outcomes. Third, 3 fidelity components correlated with IEP outcomes: teacher coaching responsiveness at the implementation level, and teacher quality of delivery and student responsiveness at the intervention levels. Implications and future directions are discussed. (PsycINFO Database Record

The World Cup Its Geographic Impact on the World

Grade Level(s): 9-12The purpose of this unit is to heighten student awareness as to the role sports, with a particular focus on soccer’s World Cup, has on world cultures using the tools of History and Geography to explain the impact.Jac-Cen-Del High School Osgood, Indian