A design-led conceptual framework for developing school integrated STEM programs: the Australian context

International Journal of Technology and Design Education - Integrated Science, Technology, Engineering, and Mathematics (STEM) education is recognised as the latest development stage on the pathway...     

How much are electric vehicles driven?

The prospect for electric vehicles as a climate change solution hinges on their ability to reduce gasoline consumption. But this depends on how many miles electric vehicles are driven and on how many miles would have otherwise been driven in gasoline-powered vehicles. Using newly-available U.S. nationally representative data, this paper finds that electric vehicles are driven considerably fewer miles per year on average than gasoline-powered vehicles. The difference is highly statistically significant and holds for both all-electric and plug-in hybrid vehicles, for both single- and multiple-vehicle households, and both inside and outside California. The paper discusses potential explanations and policy implications. Overall, the evidence suggests that today’s electric vehicles imply smaller environmental benefits than previously believed.     

What moves housing markets: A variance decomposition of the rent–price ratio

We apply the dynamic Gordon growth model to the housing market in 23 US metropolitan areas, the four Census regions, and the nation from 1975 to 2007. The model allows the rent–price ratio at each date to be split into the expected present discounted values of rent growth, real interest rates, and a housing premium over real rates. We show that housing premia are variable and forecastable and account for a significant fraction of rent–price ratio volatility at the national and local levels, and that covariances among the three components damp fluctuations in rent–price ratios. Thus, explanations of house-price dynamics that focus only on interest rate movements and ignore these covariances can be misleading. These results are similar to those found for stocks and bonds.     

Bias and Error in Mine Project Capital Cost Estimation

Previous analyses of small samples of mining projects have found that feasibility studies tend to underestimate the as-built capital costs of the project. Our review of 63 international mining and smelting projects confirms that as-built capital costs are, on average, 14% higher than as estimated in the bankable feasibility study. There is little attenuation over time of this bias in capital cost estimation, appearing to reflect an absence of learning on the part of the project sponsor or the consulting engineering firm. We argue that this persistence of bias is instead intentional and rational, driven by a scarcity of project financing and the need by project sponsors to inflate the project economics in a bid to secure financing. We find some empirical support for our contention. A second phase of the analysis examines estimation error. Roughly half of all projects' as-built capital costs fall outside of the expected ± 15% of the feasibility study capital cost estimate, even after allowing for intentional estimation bias. Cost overruns of 100% or more happen in roughly 1 out of 13 projects. Smaller projects have less estimation accuracy than large projects. Finally, our analysis of the cost overrun data reveals that a shifted lognormal probability distribution should be used when modeling mining project capital costs in a Monte Carlo analysis.     

Lewis and Clark and the Corps of Discovery: Re‐enactment Event Tourism as Authentic Heritage Travel

Abstract

Heritage tourism has evolved to include study of sub‐segments who travel to attend and participate in historical event re‐enactments. In the US, the bicentennial of the Lewis and Clark expedition to the Pacific coast and back again is being commemorated from its point of departure to its end. This paper is an exploratory study of a sample of re‐enactment tourists who attended three of the Lewis and Clark events. The role that re‐enactment tourism plays in heritage tourism is examined and preliminary findings on perceptions of nostalgia and authenticity of the re‐enactment products and events are presented. Preliminary managerial benefits and suggestions for host communities are provided.     

A Formative Approach to Modeling Residents’ Perceived Impacts of Casino Development

This study uses a formative modeling approach rather than the more common reflective modeling approach to operationalize residents’ perceived benefits/costs. Partial least square structural equation modeling was adopted to model the predicting effects of perceived benefits/costs on residents’ support for casino development. Additionally, the mediating role of satisfaction with life was examined. Drawing from a survey administered to 1047 Macao residents, this study reveals that only perceived economic and environmental benefits affect support for casino development. The mediating effect is not confirmed. Meaningful implications are provided for policymakers and casino operators.