This thesis contains two essays that use state-of-the-art econometric methods
to estimate the implicit prices of various housing and vehicle attributes in hedonic
price analysis. The additive nonparametric regression proposed by Hastie and
Tibshirani (1990) is applied to capture a series of nonlinearities relating prices to their
attributes that cannot...
This study examined associations between participation in voluntary out-of-school
programs (e.g., scouting, Boys' and Girls' Clubs, 4-H, YMCA/YWCA) in adolescence
and four negative outcomes: school dropout, early sexual activity, delinquency, and drug
use. A prospective longitudinal design had collected four waves of interview data on a
national sample of 15,000...
Seedling root fluorescence (SRF) has been used as a test in the USA since 1941 to discriminate Italian ryegrass (Lolium multiflorum Lam.) from perennial ryegrass (L. perenne L.). Generally, roots of Italian ryegrass fluorescece when exposed to ultraviolet light, while roots of perennial ryegrass do not. Presence of fluorescent seedlings...
Foodservice systems management (FSM) has had impact on the role of dietitians,
not only in the United States (US), but also in Korea. The purpose of the study
was: (1) to delineate and identify the acceptable FSM competencies for Korean
dietitians (KDs), (2) to identify factors which influenced the Korean...
The Middle Fork John Day River is composed of low gradient, alluvial valley
segments separated by constrained, canyon-like reaches, and has a history of multiple
land-uses. These factors can alter the physical and biological structure of streams, and
disrupt the longitudinal river continuum. I examined habitat, fish, macroinvertebrates,