This dissertation examines to what extent off-farm diversification may be an appropriate and accessible tool to mitigate the adverse effects from market failures and incompleteness in the crop and farm income insurance market. While the influence of the nonfarm sector has long been recognized as a primary force in shaping farm structure, off-farm income is rarely acknowledge as a risk management tool for operators and households of commercial farms. The dissertation develops a dynamic model that includes capital market imperfections, economies of scale in farm production, and the presence of adjustment costs in labor allocation decisions. The model provides a realistic characterization of the environment defining income and financial risks faced by farm operators, as well as the risk management alternatives available to them. It is found that introducing off-farm labor can substantially mitigate the adverse effects of farm income risk on farm operators' and households' welfare, even for larger commercial farms. However, the diversification of labor by the main operator seems to impose labor and managerial constraints that can reduce the intensity and technical efficiency of the farm production. Alternatively, diversification at the household level through the allocation of spousal labor off the farm provides benefits in mitigating the adverse effects of farm income risk on farm production and efficiency, and on operators and households welfare. It thus provides an efficient risk management alternative that is consistent with most rationales that are invoked to justify farm policies. Results suggest that the increasing incidence and importance of off-farm income within the farm population of most OECD countries is highly relevant in the design of effective farm policies This form of diversification can reduce the need and effectiveness of farm income stabilization polices. While it has been argued elsewhere that broader economic policies had a large influence in closing the income gap between farm and urban households, such policies may also have a role to play in addressing farm income risk issues and, in some cases, may represent more sustainable and efficient policy alternatives.

This collection of essays examines the impact of two antecedents of household food consumption: SNAP and habit formation to nutrients. Household food choice invariably plays a substantial role in health outcomes such as obesity. Low-income households may be especially vulnerable to obesity as they face a more restricted set of food choices due to income constraints and may have less information on healthy eating relative to high-income households. This dissertation unravels this dynamic by providing causal estimates of the effect of two major determinants of food choice. Chapter 2 and chapter 3 test the impact of SNAP participation on consumption of foods that are likely to cause obesity. With some exceptions, SNAP restricts benefits to be spent only on unprepared grocery food items from participating retailers. Chapter 2 considers the broad category of Food Away From Home (FAFH) which is shown to be less healthy than meals prepared at home and shows that SNAP significantly reduces FAFH expenditure of participants. However, the magnitude of this decrease is not large enough to have a tangible impact on obesity. Chapter 3 considers household expenditure on carbonated soda, which is the key source of sugar intake among low-income households. Not only is carbonated soda SNAP-eligible, it is cheaper when purchased with SNAP benefits relative to cash because benefits are exempt from all sales taxes. Results show that SNAP participation leads to a significant rise in carbonated soda sales in low-income counties. I also find that the SNAP tax exemption does not lead to higher consumption among participants relative to non-participants. Chapter 4 tests habit formation to dietary fat using purchases of ground meat and milk products. Products in both categories have salient fat content information on the packaging. Products within each category differ only by fat content and are usually identical otherwise. Differences in habit formation are, therefore, caused by different levels of fat content. Results show a positive association between habit formation and fat content for all products in the ground meat category and all products, except fat-free milk, in the milk category. However, this relationship is modest leading to the conclusion that policy interventions, such as a saturated fat tax, might be effective in discouraging consumption of high fat products.

The Real Food Challenge (RFC) is a national student movement that is trying to harness student power to shift $1 billion'roughly 20% of college and university food budgets across the country towards local, ecologically sound, fair, and humane food sources, what they call "real" food, by 2020. The University of Vermont (UVM) was the fifth university in the country to sign the Real Food Campus Commitment, pledging to shift at least 20% of its own food budget towards "real" food by 2020. The purpose of this thesis is to evaluate the implementation of the Real Food Campus Commitment at UVM. In order to examine the demand for "real" food on the UVM campus I analyzed a survey of 904 undergraduate students that used contingent valuation to evaluate students' willingness-to-pay (WTP) for the "real" food attributes. I found that a majority of students are willing to pay a positive premium for "real" food, but that the average premium is quite small. Furthermore, I found that student characteristics and attitudes significantly influence WTP. Specifically, gender, residency, college, and attitudes about price and origin of food are significant predictors of WTP. To evaluate the potential of the RFC to significantly transform the food system I analyzed the activities and components of the RFC using the framework of food democracy. In addition to analyzing the activities and components of the RFC as a national movement, I analyzed the movement as it is being realized on the ground at UVM. My analysis reveals that the RFC has the potential to transform the food system because it promotes all five dimensions of food democracy as both a national movement and as realized on the ground at one university. Both of my analyses suggest that the RFC has significant potential to transform the food system at UVM, but that food systems education for the greater student body will crucial to see that potential fulfilled. This thesis can contribute to the success of the Real Food movement at UVM by identifying areas of weakness and opportunities for improvement in terms of increasing student preference for "real" food and promoting food democracy. Moreover, this thesis may be useful for national RFC staff and other campuses that are implementing the RFC, as it demonstrates how the RFC is being played out on the ground at an institution that is at the forefront of the movement.

The need to protect diverse biological resources from ongoing development pressures is one of today's most pressing environmental challenges. In response, "ecosystem services" has emerged as a conservation framework that links human economies and natural systems through the benefits that people receive from nature. In this dissertation, I investigate the science-policy interface of ecosystem services in order to understand the use of ecosystem service decision support tools and evaluate the pathways through which ecosystem services knowledge impacts decisions. In the first paper, I track an ecosystem service valuation project in California to evaluate how the project changes the social capacity to make conservation-oriented decisions and how decision-makers intend to use ecosystem services knowledge. In a second project, I analyze a global sample of cases and identify factors that can explain the impact of ecosystem services knowledge on decisions. I find that the perceived legitimacy of knowledge (whether it is unbiased and representative of many diverse viewpoints) is an important determinant of whether the knowledge impacts policy processes and decisions. For the third project, I focus on the global use of spatial ecosystem service models. I analyze country-level factors that are associated with use and the effect of practitioner trainings on the uptake of these decision support tools. Taken together, this research critically evaluates how ecosystem service interventions perform. The results can inform the design of boundary organizations that effectively link conservation science with policy action, and guide strategic efforts to protect, restore, and enhance ecosystem services.

Sustainable landscaping includes utilization of plants requiring few inputs. We chose four species showing potential for use in arid landscapes: Purshia mexicana, Shepherdia argentea, Shepherdia rotundifolia, and Alnus maritima. We sowed seeds of S. rotundifolia, S. argentea and P. mexicana in three substrates with various water-holding properties due to differing amounts of organic matter (OM). S. rotundifolia germination was maximized in a calcined clay (66.2%) containing no OM and had low germination (12.7 - 21.8%) in the other substrates. S. argentea germination (42.3 to 53.7%) was similar in all substrates. Poor seed quality of P. mexicana resulted in inconclusive results. Our results suggest that germination of some species is enhanced by substrates with excellent drainage properties. We also investigated effects of different rates of controlled-release fertilizer (CRF) on symbiotic nodule formation in seaside alder. We found that lower than prescribed rates of CRF enhanced nodulation without compromising nitrogen status.

This dissertation investigates food safety regulations and international trade of agricultural products dividing into three aspects: the signalling effect from U.S. strict food safety regulations on U.S. vegetable exports, political determinants of sanitary and photosanitary non-tariff barriers, and the impact of trade barriers on employment in developing countries. In chapter 2, we investigate the impact of high U.S. maximum residue limit (MRL) standards on U.S vegetable exports to 102 countries utilizing the hierarchical model. MRL, which is one of non-tariff barriers with respect to food safety, is applied to home and foreign countries at the same time. Thus, firms in countries with higher food safety standards are expected to have a competitive advantage from the ‘signalling effect’. The results show that high MRL standards in the U.S. have a positive impact on U.S. vegetable exports, indicating the ‘signalling effect’ from the strict U.S. domestic MRL standards. The results provide policy makers with insights into how strict food safety regulations of the home country can be considered as a catalyst for increasing competitiveness in international markets. In chapter 3, we examine the political determinants of SPS notifications using a nonlinear threshold model with possible threshold variables (GDP per capita and tariff rate). This article finds no threshold values in both variables of GDP per capita and tariff rate. Our results also show that GDP per capita has a positive relationship with SPS notifications that are one of proxy variables for food quality. That implies the importance of quality competition in agriculture and food sectors. Our finding also represents no significant effect of tariff on SPS notifications. This indicates that a law of constant protection, presenting an inverse relationship between tariff and non-tariff barriers, is not satisfied in the agricultural and food sectors. In chapter 4, we investigate the impact of tariff and SPS barriers on food manufacturers’ skilled and unskilled employment in developing countries utilizing a structural equation model. Results show that both tariff and SPS barriers have a positive effect on unskilled labor employment in developing countries, while trade barriers are not associated with skilled labor employment. This implies that Hecksher-Ohlin theory, presenting labor abundant countries have a comparative advantage in labor-intensive industries such as food, explains well our results since developing countries are abundant in low-skilled labor. We also find that the age of food firm in developing countries is positively related to skilled employment; however, no relationship with unskilled employment. This implies that older food firms change their production process from labor intensive to capital or machine intensive.

Environmental goals such as urban water conservation and pollution control regulations are typically achieved through price and non-price methods. This dissertation offers an analysis of the non-price approaches, including the rationing of water for particular users, installation of particular technologies, and adoption of particular certifications to achieve environmental goals. To begin, an analysis of California’s 2015 urban water conservation mandate was performed. Results indicate that the average welfare loss of the mandate is $6,107 per acre-foot of restriction in Northern California and $2,757 per acre-foot of restriction in Southern California. In terms of monthly household-level willingness-to-pay (WTP) to avoid the mandate, results illustrate that households have a WTP between $5 and $200 per month. Northern Californian utilities were generally in compliance with their mandated conservation targets, while Southern Californian utilities tended to fall short. The second essay focuses on analyzing how web-based Home Water Use Reports (HWURs) affect household-level water consumption in Folsom City, California. The HWURs under study, offered by the company Dropcountr (DC), share social comparisons, consumption analytics, and conservation information to residential accounts, primarily through digital communications. We found that there is a 7.8% reduction in average daily household water consumption for a typical household under treatment of the DC program. Results suggest that the effect of DC varies by the baseline consumption quintile, the number of months in the program, the day of the week, message type, and enrollment wave. Furthermore, we find that indicate these responses to DC program likely come from the information channel rather than moral suasion. The final essay studies the effectiveness of ISO-14001 on pollution reduction as a non-price pollution control approach. Manufacturers have been increasingly relying on environmental management systems (such as ISO 14001 based ones) to comply with government regulations and reduce waste. In this essay, we investigated the impact of ISO 14001 certification on manufacturers’ toxic release by release level. Results show that ISO 14001 had a negative and statistically significant effect on the top 10% manufacturing sites regarding the on-site toxic release, but it did not reduce off-site toxic release. Therefore, one should not expect ISO 14001 to have a uniform impact on manufacturing sites’ environmental performance. For large firms, encouraging voluntary adoption of ISO 14001 might be an effective government strategy to reduce on-site pollution.

Over the past five decades, the Saudi government has adopted many agricultural policies aimed to: achieve self-sufficiency of food, increase the participation of the agricultural sector in the economy, and reduce the consumption of irrigation water. Due to conflicts among government objectives and the incompatibility of farmers' objectives with those of some agricultural policies, the government has not been able to fully achieve its objectives. To accomplish its goals the government, or decision maker needs to understand the farmer, or follower, reaction when s/he adopts a new decision. The dissertation aims to build a model that achieves government goals of minimizing the total irrigation water used while improving the total revenue from agricultural production, while incorporating farmers’ objective of maximizing their profit. To do this, linear programming and bi-level multi-objective multi-follower models are developed and applied to six regions of Saudi Arabia, which account for around 70 percent of cropland and consume about 13.131 BCM of irrigation water per year. The result of the linear programming model applied to the Riyadh region shows there is an unobserved factor effect on the farmers’ decisions, including irrigation water demand that comes from the presence of indirect subsidies. On the other hand, the bi-level multi-objective, multi-follower model shows there is the possibility to minimize irrigation water consumption while maintaining current total revenue from crop production through reallocating irrigation water among regions, while applying a variety of crop specific tax and subsidy policies among the regions to alter planting decisions.

This thesis investigates how proximity to parks, historic district designations, and water quality are valued at residential housing prices. The first essay argues that the negative influences of parks and historic districts, if not noticed, could promote negative externalities and unincentivized investments. I find a negative impact on housing values for a close proximity to a park, suggesting disamenities in park features. When the boundary discontinuity and park amenities are considered, I find a positive valuation for a park. Overall, these results imply a mixed influence of parks on homeowners. From the historic district standpoint, I find a positive valuation of the local historic districts over the surrounding neighborhoods. The latter findings indicate that the benefits of locally designated areas outweigh the negative impacts. The second essay researches a probable lead risk in the water supply on the residential market. I argue strongly for the possibility of hidden-type information relative to lead in water supplies. I find that the influence of lead risk in their water supply is not statistically significant. The test for asymmetric information validates the expectation that homes in the relatively high lead-risk neighborhoods might not be informed of the level of lead-risk in their water supply.

My dissertation develops and analyzes ecological economic models to study the complex dynamics of an ecological economic system (EES) and investigate various conditions and measures which can sustain a developing economy over the long term in view of resilience and sustainability. Because of the intrinsic complexity of the system, I take a systems approach, using economics as the foundation for the basic structure of an ecological economic model, and system dynamics as the method to build and analyze such a complex ecological economic model. Throughout my dissertation, the model developed by Brander and Taylor (1998) is adopted as a baseline model (henceforth the BT model). The BT model explains population-resource dynamics and is characterized as a general equilibrium version of the Gordon-Schaefer Model, using a variation of the Lotka-Volterra predator-prey model. The findings are presented as three articles. The first article provides a comprehensive analysis of the BT model and its descendants, to elicit directions for further research, including population growth logic, substitutability, innovation, capital accumulation, property rights and institutional designs, and modeling approach. The second article extends the BT model to study the resilience of an EES reflecting three key issues in modeling such systems: 1) appropriate system boundary, 2) non-convexity of ecosystems, and 3) adaptation. The article discusses two types of thresholds: the ecological threshold, a threshold for an ecological system independent of economic systems, and the ecological economic threshold, a threshold for an EES. The latter is often different from the former and is highly dynamic and context dependent. The third article is another extension of the BT model to study the sustainability of an EES by implementing the suggestions made by the first article except for property rights and institutional designs. The main focus is on the impact of endogenous innovation regarding input substitutability on the system sustainability. The main finding is that improvement in the input substitutability, ceteris paribus, may not contribute to sustainable development despite its contribution to expanding the economy. However, it could be possible for susbstitutability improvements to contribute to sustainable development when combined with other specific types of technological progress.