ANOMALY PATTERNS OF CLIMATE OVER THE WESTERN UNITED STATES, 1700–1930, DERIVED FROM PRINCIPAL COMPONENT ANALYSIS OF TREE-RING DATA

1971 ◽  
Vol 99 (2) ◽  
pp. 138-142 ◽  
Author(s):  
V. C. LaMARCHE ◽  
H. C. FRITTS
Author(s):  
Kavir Patel ◽  
Ashfaaq Mohamed ◽  
Gary W. Van Vuuren

Volatile markets and economic environments can significantly distort the shape and smoothness of yield curve movements. This study explores the influence of movements in United States interest rates on South African interest rates. This study aims to identify the main underlying movements present in the United States and South African yield curves and to further determine the dominant factors that are responsible for driving South African interest rate movements. The principal settings for the study were the United States and South African markets representing, respectively, a developed and developing market. Principal component analysis was used to discern the major drivers of developing and developed market interest rates. The findings show that the principal component analysis technique is able to effectively classify and quantify the movements of yield curves across both markets in terms of three main factors, namely level, slope and curvature shifts. During certain periods, South African yield curve changes were largely driven by variations in United States interest rates and the rand/dollar exchange rate. Results also demonstrated that a volatile market and economic environment can significantly distort the shape and smoothness of yield curve movements.


2020 ◽  
Vol 12 (12) ◽  
pp. 5169
Author(s):  
Ariana P. Torres ◽  
Nicholas A. Lancaster ◽  
Luiz H. B. Vilas Boas

Though the demand for organic grains is increasing, domestic supply is falling short. One of the major barriers to entry in the organic grain market for producers is the inability to identify an appropriate buyer, as well as a lack of understanding buyer perceptions, assistance offered, and contracting strategies. While classifications of organic producers exist, and have helped researchers and policymakers develop incentives, no such classification exists for organic grain buyers. Previous works have identified communication gaps between buyers and producers of organic grains, yet buyers’ beliefs and requirements regarding organic grain are not well documented in literature. Drawing from the personal values theory, this study proposes the categorization of organic grain buyers based on their commitment to the organic industry, with categories such as committed organic and pragmatic organic. We profiled grain purchases, buying arrangements, grain requirements, relationships, and business characteristics by buyer type. Means comparisons among groups showed that committed organic buyers seem to be primarily driven by social focus values, while pragmatic organic buyers tend to show values related to personal focus. A principal component analysis suggested the existence of three components constructed by contract-, perceptions-, and relationship-oriented characteristics in buyers. Our results allowed us to identify potential marketing opportunities by providing insight regarding types of assistance offered by buyers, how to build and maintain a relationship with buyers, types of purchasing agreements used, and purchasing agreement characteristics and requirements. Industry stakeholders can use this information to identify appropriate buyers based on times contracts are signed, payment timing, storage and transportation requirements, and the amount of organic practice documentation buyers require. Our categorization can provide the foundation for further research in the organic grain industry.


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