Social and Behavioral Sciences Commons^™

Quantifying Terrestrial Ecosystem Carbon Dynamics With Mechanistically-Based Biogeochemistry Models And In Situ And Remotely Sensed Data, Shaoqing Liu

Open Access Dissertations

Terrestrial ecosystem plays a critical role in the global carbon cycle and climate system. Therefore, it is important to accurately quantify the carbon dynamics of terrestrial ecosystem under future climatic change condition. This dissertation evaluates the regional carbon dynamics by using upscaling approach, mechanistically-based biogeochemistry models and in situ and remotely sensed data.

The upscaling studies based on FLUXNET network has provided us the spatial and temporal pattern of the carbon fluxes but it fails to consider the atmospheric CO2 effect given its important physiological role in carbon assimilation. In the second chapter, we consider the effect of atmospheric CO2 …

Essays On Malawian Agriculture: Micro-Level Welfare Impacts Of Agricultural Productivity; Profitability Of Fertilizer Use; And Targeting Of Fertilizer Subsidy Programs, Francis Addeah Darko

Open Access Dissertations

This dissertation comprises of three essays that address different aspects of agriculture in Malawi using a two-wave panel data collected by the National Statistical Office of Malawi with support from the World Bank Living Standards Measurement Study – Integrated Surveys on Agriculture (LSMS-ISA) program. Each essay stands alone as an independent study because of differences in research questions and the methodologies used in addressing the questions.

The first essay analyzes the micro-level welfare impacts of agricultural productivity. Welfare is measured by various dimensions of poverty and food insecurity; and agricultural productivity is measured by maize yield and value of crop …

The Labor Market Consequences Of Endogenous Low-Skill Migration With A Market-Based Immigration Policy, German A. Marquez Alcala

Open Access Theses

The undocumented migration of Mexican nationals to the U.S. is largely influenced by labor demand in low-skill sectors. The legal migration channels available to Mexican nationals with little education are based on family petitions and subject to visa quotas which are dwarfed by the demand for entry to the United States; visa approval can take upwards of 20 years for a Mexican national with little education and few resources. Thus, undocumented immigration is a more responsive unskilled labor distribution mechanism than the existing quota-based immigration policy. However, the restrictive legal migration channels and increased costs of undocumented migration are stifling …

Mergers And Acquisitions In Food And Agribusiness: Returns, Drivers, And Long Run Performance, Josiah M. Ringelberg

Open Access Theses

Food and agribusiness in the U.S is a dynamic and ever changing business. The industry has seen booms and busts, considerable consolidation, and continued globalization in the past few decades. Businesses operating within its sectors have had to demonstrate flexibility and adaptability as the industry’s landscape consolidates at the consumer, supplier, and producer level. One strategy companies have used to grow and position themselves throughout years of industry consolidation has been merger and acquisition (M&A) transactions.

During the eleven years from 1985 and 1995, the food industry was listed in the top 10 M&A most active industries ten times. It …

Trade And Agriculture Policy Options To Improve The Wheat Subsector In Afghanistan, Ghulam Hazrat Halimi

Open Access Dissertations

In Afghanistan wheat availability is important for national food security as it is the key staple food, accounting for over half of calorie intake. The country has imported on average 32% of its wheat consumption over the period 2000-2015, primarily from Pakistan and Kazakhstan. Since domestic production is volatile, consumer well-being depends on access to international markets.

Pakistan, a key supplier of wheat and flour to Afghanistan, has not been a reliable source for Afghanistan to meet its wheat deficit. Pakistan subsidizes and stabilizes its wheat production, and this benefited Afghan consumers before 2008. Pakistan restricted wheat and flour exports …