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| 1 |
ID:
125497
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| Publication |
2013.
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| Summary/Abstract |
While anaerobic digester systems (ADS) have been increasingly adopted by large dairy farms to generate marketable energy products, like electricity, from animal manure, there is a growing need for assessing the feasibility of regional ADS for multiple farms that are not large enough to capitalize their own ADS. Using geographical information system (GIS) software, this study first identifies potential sites in a dairy region in Vermont, based on geographical conditions, current land use types, and energy distribution infrastructure criteria, and then selects the optimal sites for a given number of ADS, based on the number of dairy farms to be served, the primary energy input to output (PEIO) ratio of ADS, and the existing transportation network. This study suggests that GIS software is a valid technical tool for identifying the potential and optimal sites for ADS. The empirical findings provide useful information for assessing the returns of alternative numbers of ADS in this region, and the research procedures can be modified easily to incorporate any changes in the criteria for this region and can be applied in other regions with different conditions and criteria.
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| 2 |
ID:
192333
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| Summary/Abstract |
Two essential strategies to understand the mechanisms of intergenerational mobility are to compare mobility across countries and across time. However, for multi-generational mobility, estimates for developing countries are mostly missing, and trend studies are rare. This paper uses education to measure social status and provides nationally representative estimates of social mobility over three generations in China that are suitable for international comparison. Results show that grandparents’ education positively correlates with children’s education, controlling for the parents’ education. This grandparent effect is comparable to what is found in Western countries, despite differences in cultures and institutions. During the sample period, the correlation between grandparent and child education is relatively stable. When exploring mechanisms, we find that the observed grandparent effect is primarily due to omitted information from the parents’ generation, not direct interactions between grandparents and children.
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