National Park Service nonnative plant control in the Indiana Dunes National Lakeshore

Invasive plants have become a growing threat to plant diversity and hydrology in the Indiana Dunes National Lakeshore. Invasive plants compete with native plants for nutrients and sunlight, and certain invasive species have been known to completely take over certain areas of wetlands, nearly destroying entire ecosystems. The Dunes Lakeshore contains over 1,400 plants species and is one of the top ten most diverse national parks in the United States. The mission statement of the National Park Service is to “preserve for the educational, inspirational, and recreational use of the public certain portions of the Indiana Dunes.” In order to properly maintain this unique habitat for future generations, a variety of techniques have been implemented to reduce the growth and germination of many nonnative plants in high quality areas such as Cowles Bog, West Beach, and Tolleston Dunes. We focused on depleting the seed bank of invasive plants by targeting certain species such as garlic mustard, Dame’s Rocket, and Crown Vetch before they seeded. Backpack sprayers, brush cutters and loppers were used to kill invasive plants within the park and GPS was used to monitor our progress

Measuring and explaining competition in the financial sector

The first part of this paper provides a systematic discussion of the structural problems of competition on financial markets as observed from the demand and from the supply side, using a diagnostic framework. Potential impediments to competition are concentration, entry barriers, lack of transparency, product complexity, switching and search costs, financial illiteracy, lack of consumer power and weak intermediaries. In response to such financial market failures, we suggest a number of possible policy reactions. The second part of the paper investigates ways to measure competition and provides empirical figures on banking competition in 101 separate countries and assesses the market structure as monopolistic (or a perfect cartel), perfectly competitive or monopolistic competitive. Also, banking competition is explained, using explanatory variables of market structure, contestability, inter-industry competition, and institutional and macro economic conditions. This analysis provides possible instruments for reform in order to help promote competition. Next, the impact of banking consolidation is examined. Finally, developments in competition are observed over time, generally pointing to a downward trend.competition, concentration, entry barriers, transparency, consolidation, contestability, institutional conditions, restrictions on activities or investment, regulation, Panzar-Rosse model.

Assessing Competition with the Panzar-Rosse Model: The Role of Scale, Costs, and Equilibrium

The Panzar-Rosse test has been widely applied to assess competitive conduct, often in specifcations controlling for firm scale or using a price equation. We show that neither a price equation nor a scaled revenue function yields a valid measure for competitive conduct. Moreover, even an unscaled revenue function generally requires additional information about costs and market equilibrium. Our theoretical findings are confirmed by an empirical analysis of competition in banking, using a sample covering more than 110,000 bank-year observations on almost 18,000 banks in 67 countries during 1986-2004.Panzar-Rosse test, competition, firm size

Using Virtual Worlds to Identify Multidimensional Student Engagement in High School Foreign Language Learning Classrooms

Virtual world environments have evolved from object-oriented, text-based online games to complex three-dimensional immersive social spaces where the lines between reality and computer-generated begin to blur. Educators use virtual worlds to create engaging three-dimensional learning spaces for students, but the impact of virtual worlds in comparison to the traditional face-to-face counterpart has been uncertain in terms of multidimensional student engagement. Research has a need to determine the impact of virtual worlds on student engagement in comparison to the traditional face-to-face environment. The study examined the effects of virtual world and face-to-face learning environments on high school foreign language students\u27 emotional, cognitive, and behavioral engagement, as well as combined engagement. A two-way MANOVA was used to determine the effect of traditional face-to-face and virtual world learning environments on combined student engagement. A 2 x 2 analysis of covariance was used to determine the effect of traditional face-to-face and virtual world learning environments on emotional student engagement. A 2 x 2 analysis of covariance was also used to determine the effect of traditional face-to-face and virtual world learning environments on cognitive student engagement. A t-test was used to determine the effect of traditional face-to-face and virtual world learning environments on behavioral engagement. The study did not find evidence of overall, cognitive, emotional, or behavioral engagement difference between the two learning environments. The findings indicate the virtual world environment is similar to the traditional face-to-face environment in terms of student engagement. School administrators and teachers can benefit from this research when determining effective means of creating highly engaging learning environments for students. Virtual worlds can be a medium for engaging learning opportunities for students in face-to-face and virtual schools. Additional research in this area is recommended to determine the impact of virtual worlds with different student populations and subject areas

Mean Reversion in International Stock Markets: An Empirical Analysis of the 20th Century

This paper analyzes mean reversion in international stock markets during the period 1900-2008, using annual data. Our panel of stock indexes in seventeen developed countries, covering a time span of more than a century, allows us to analyze in detail the dynamics of the mean-reversion process. In the period 1900-2008 it takes stock prices about 13.8 years, on average, to absorb half of a shock. However, using a rolling-window approach we establish large fluctuations in the speed of mean reversion over time. The highest mean reversion speed is found for the period including the Great Depression and the start of World War II. Furthermore, the early years of the Cold War and the period covering the Oil Crisis of 1973, the Energy Crisis of 1979 and Black Monday in 1987 are also characterized by relatively fast mean reversion. Overall, we document half-lives ranging from a minimum of 2.1 years to a maximum of 23.8 years. In a substantial number of time periods no significant mean reversion is found at all, which underlines the fact that the choice of data sample contributes substantially to the evidence in favor of mean reversion. Our results suggest that the speed at which stocks revert to their fundamental value is higher in periods of high economic uncertainty, caused by major economic and political events.mean reversion, market efficiency

Junior Recital, Jacob Bennett, saxophone

The presentation of this junior recital will fulfill in part the requirements for the Bachelor of Music degree in Music Education. Jacob Bennett studies saxophone with Mr. Albert Regni