Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 26 for “"Net effects"”.
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Interaction strengths and net effects in food web models
… allow for the quantification of a species total net effect. It was found that there is a strong and consistent positive relationship between a species body size and its total net effect for a set of 97 synthetic food webs and also for the Ythan Estuary and Tuesday Lake food webs (empirically …
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Distributed household effects of climate policy in the United States
The net effects of various climate policies on households in the United States are assessed, with particular attention to the distribution of economic outcomes across geography, urbanity, and income groups. Climate policy has the potential to assess more costs to low-income households than …
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Socio- Economic differentials in fertility in Zimbabwe from 1980 to 2005
… PPRs estimates. Further analysis of the net effects of economic status and education using multivariate logistic regressions suggests the odds of having a child (not having a child) decreases (increases) with economic status and education. Overall, even after controlling for various …
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Assessment of policies and socio-economic factors affecting pesticide use in the Philippines
… nine pesticides was calculated to quantify the net effects of pricing and exchange rate policies on the degree of subsidy or tax experienced by pesticide importers. It was found that the effective rate of protection for the nine pesticides was between negative 12 and 25 percent when the exchange …
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Economic Analyses of Crime in England and Wales
… techniques to control for area-specific fixed effects as well as the endogeneity of law enforcement variables. In our third study, we allow crime rate to have spatial spillover effect, in other words, the crime rate in one area is affected by, in addition to its local crime-influential factors, …
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EFFECTS OF NITROGEN DEPOSITION ON BOREAL BOGS: A THREE YEAR NITROGEN FERTILIZATION AND TRACER EXPERIMENT
… and decomposition can be affected, but the net effects of N fertilization are complex and unclear. A three-year N fertilization experiment with 15N double labeled 15NH415NO3 as a tracer was designed to study the effects of increasing N deposition on various N pools (including microbial …
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Race and Gender Differences in Educational Attainment, Field of Study, and Increments to Earnings (Evidence From University of Illinois Tracer Studies and Nationwide Earnings Data)
… model and a Regression technique to estimate the net effects of investment in higher education in the United States, more comprehensively on key measures of monetary and non-monetary outcomes of education. Specifically, the study examines the returns to University of Illinois education by race, …
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Nonlinear Microscopy for Material Characterization
… fs. This signal enhancement likely indicates the net effects of probing several Raman active C-H stretch bands near 2950 cm^-1. This FWM technique may be applied to characterize the dominant resonant response of the sample under study. Furthermore this technique presents the newfound capability to …
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Integrated Modeling of Agricultural Reactive Nitrogen in the United States: Emissions, Impacts, and Mitigation Strategies
… vary widely and may introduce trade-off effects. Therefore, there is a strong need for a comprehensive assessment that considers the emissions, impacts, and mitigation strategies for Nr. I established an integrated assessment framework that connects a process-based agroecosystem model …
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Ecology of Mite Phoresy on Mountain Pine Beetles
… to new habitats, is expected to produce positive effects for symbionts and no effects for hosts, yet negative and positive effects have been documented. This poses the question of whether phoresy is indeed a commensal interaction and demands clarification. In bark beetles (Scolytinae), both …
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Lagoon effluent treatment using grass filtration bays
… of flow was lost through infiltration while the net effects of rainfall and evapotranspiration account for about 1.2 mm/day of losses. The high infiltration losses may be due to the root channelling and cracks in the soil. The trials showed a temporal trend in most of the monitored parameters. …
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The interactive effects of fire and herbivory on understorey vegetation and its dependent fauna
… shown to have unexpected, and often undesirable effects on ecosystems and biodiversity. Improving our ability to predict and manage the outcomes of multiple disturbances is therefore an important research priority. In this thesis, I focused on the interaction between fire and grazing (or …
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The interactive effects of fire and herbivory on understorey vegetation and its dependent fauna
… shown to have unexpected, and often undesirable effects on ecosystems and biodiversity. Improving our ability to predict and manage the outcomes of multiple disturbances is therefore an important research priority. In this thesis, I focused on the interaction between fire and grazing (or …
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The impact of drought on U.S. hay prices
… for cattle producers and federal safety net programs. Cattle producers rely on forage through grazing pastureland or hay as a primary feed source. Climate change and increasing extreme weather events, including more widespread and persistent drought, threaten the viability of livestock …
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Conditional and Differential? Locating the Role of Civil Society in Anti-corruption Policy Outcomes
… from regression analyses shows the average net effects of the independent variables, the second study looks at the combinatorial effects of conditions necessary and/or sufficient for the outcome high perceived corruption to occur through fuzzy-set Qualitative Comparative Analysis (fsQCA). …
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Three Essays on Colombia's Telecommunications
… between Comcel and Telmex, had a pro-competitive effects on the provision of broadband. Next I show that the services provided by Comcel and Telmex were complements and that the pro-competitive effects of the merger can be explained by this complementarity. Finally, I study the effects of price …
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Digital Infrastructure Policy and Small Business Digitalisation: Evidence From the UK Gigabit Broadband Rollout During Covid-19
… strategies to assess heterogeneous policy effects across firm size categories. Drawing on theoretical frameworks from infrastructure economics, resource-based views of firm capabilities, and policy capture mechanisms, this research develops and tests hypotheses regarding differential policy …
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The application of historical data and computational methods for investigating causes of long-term morphological change in estuaries : a case study of the Mersey Estuary, UK
… behaviour of estuary morphology results from the net effects of perturbations induced by tidal, seasonal and episodic events, averaged over a longer period. Theoretically a dynamic equilibrium may exist between deposition and erosion when considered over a time period that is sufficiently long to …
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Impacts of hemiparasitic plants on the vegetation and biogeochemical cycling in two contrasting semi-natural grassland types
… and diversity by both parasitism and litter effects. The drainage of resources by the hemiparasite suppresses preferred host species to the benefit of non-host species. On the other hand, hemiparasitic litter inputs enhance nutrient cycling with indirect positive effects on both host and …
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An investigation into the influence of buildability factors on productivity of <em>in situ</em> reinforced concrete construction
… was conducted to investigate and quantify the effects and relative influence of architectural and structural buildability factors on the labour productivity of in situ reinforced concrete buildings. In this project, the major buildability factors hypothesised to influence the labour …
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