Rising Stars, Superstars and Dying Stars: Hedonic Explorations of Autograph Prices

Key studies have explored the economics of rising stars, superstars and ‘has beens’, but relatively little economic literature exists on the associated parallel memorabilia markets. Using a random sample of 1151 pieces of autographed artefacts, on sale through a retail and internet outlet, hedonic analysis is undertaken to elicit significant characteristics in price determination. The data principally consists of autographs of past and current cultural icons along with some sporting and historical figures. We explore, inter alia, price differences with respect to ‘dead’ or ‘alive’ signatories, gender, sphere of fame, nationality, the age of the signatory and the nature of the artefact on which the signature is written. Alternative model specifications have been explored and compared. A notable difference emerges between those autographs with photographs and those without. There are also differences in prices according to whether individuals had been famous for their roles in just films, just television, or in both.

The impact of daily writing on kindergarten students\u27 phonemic awareness.

The purpose of this quantitative study was to determine whether or not a significant relationship exists among daily writing and student growth in phonemic awareness. The study also considered the impact of writing on the phonemic awareness development of students at different literacy levels. Although studies exist on the importance of phonemic awareness development in reading acquisition, a deficit exists examining the correlation among daily writing and the phonemic awareness development of students representing different literacy levels. Forty students in an experimental group engaged in daily writing opportunities, while 37 students in the control group engaged in less frequent writing opportunities. Data included pre- and posttest results from The Phonological Awareness Test. Descriptive statistics were chosen to describe the demographic variable of group, gender, and ability level and inferential statistics included the two-sample t test. Results were statistically analyzed using SPSS 13.0 and concluded that a significant relationship does exist among daily writing opportunities and the phonemic awareness development of kindergarten students. Daily exposure to writing had a significant impact on students in the low-risk experimental group. Although a significant difference was not found in the some/at-risk groups, the experimental group had a larger average increase on the phonemic awareness measure. Results will fill the existing gap between research and practice concerning the correlation among daily writing and phonemic awareness, and the reciprocal impact this correlation has on students\u27 literacy development. In addition, results may influence early childhood educators to implement daily writing opportunities as a method for increasing students\u27 phonemic awareness development

Comparing Line and HR Executives’ Perceptions of HR Effectiveness: Services, Roles, and Contributions

This study compared HR and line executives’ evaluations of the effectiveness of the HR function in terms of its service delivery, roles, and contributions to the firm. Survey responses from 44 HR and 59 line executives from 14 companies indicated that (a) HR executives consistently rated the functions effectiveness higher than did line executives, and (b) the greatest differences were observed on the more important and/or strategic aspects of HR. Implications are discussed

Measurement Error in Research on Human Resource Decisions and Firm Performance: How Much Error is There and How Does its Influence Effect Size Estimates?

Recent empirical research finds that the relationship between human resource (HR) decisions and firm performance is significant in both statistical and practical terms. However, the typical research design in this area relies upon on a single respondent to validly assess firmwide HR practices. To date, no study has adequately addressed the reliability of such measures, a basic requirement of construct validity. Previous efforts have either defined reliability so narrowly as to miss a major source of measurement error (raters) or have estimated the unreliability due to raters using incorrect methods. In both cases, the result is upwardly biased estimates of reliability. We estimate reliabilities using intraclass correlation and generalizability coefficients. Our reliability estimates suggest substantial measurement error in the types of HR effectiveness and HR practice measures typically used to predict firm performance. We discuss how this degree of measurement influences research and policy implications

CO Abundance Variations in the Orion Molecular Cloud

Infrared stellar photometry from 2MASS and spectral line imaging observations of 12CO and 13CO J = 1-0 line emission from the FCRAO 14m telescope are analysed to assess the variation of the CO abundance with physical conditions throughout the Orion A and Orion B molecular clouds. Three distinct Av regimes are identified in which the ratio between the 13CO column density and visual extinction changes corresponding to the photon dominated envelope, the strongly self-shielded interior, and the cold, dense volumes of the clouds. Within the strongly self-shielded interior of the Orion A cloud, the 13CO abundance varies by 100% with a peak value located near regions of enhanced star formation activity. The effect of CO depletion onto the ice mantles of dust grains is limited to regions with AV > 10 mag and gas temperatures less than 20 K as predicted by chemical models that consider thermal-evaporation to desorb molecules from grain surfaces. Values of the molecular mass of each cloud are independently derived from the distributions of Av and 13CO column densities with a constant 13CO-to-H2 abundance over various extinction ranges. Within the strongly self-shielded interior of the cloud (Av > 3 mag), 13CO provides a reliable tracer of H2 mass with the exception of the cold, dense volumes where depletion is important. However, owing to its reduced abundance, 13CO does not trace the H2 mass that resides in the extended cloud envelope, which comprises 40-50% of the molecular mass of each cloud. The implied CO luminosity to mass ratios, M/L_{CO}, are 3.2 and 2.9 for Orion A and Orion B respectively, which are comparable to the value (2.9), derived from gamma-ray observations of the Orion region. Our results emphasize the need to consider local conditions when applying CO observations to derive H2 column densities.Comment: Accepted for publication in MNRAS. 21 pages, 14 figure

Discovery Of A Molecular Outflow in the Haro 6-10 Star-Forming Region

We present high sensitivity 12CO and 13CO (1-0) molecular line maps covering the full extent of the parsec scale Haro~6-10 Herbig-Haro (HH) flow. We report the discovery of a molecular CO outflow along the axis of parsec-scale HH flow. Previous molecular studies missed the identification of the outflow probably due to their smaller mapping area and the confusing spectral features present towards the object. Our detailed molecular line study of the full 1.6 pc extent of the optical flow shows evidence for both blueshifted and redshifted gas set in motion by Haro~6-10 activity. The molecular outflow is centered at Haro~6-10, with redshifted gas being clumpy and directed towards the northeast, while blueshifted gas is in the southwest direction. The molecular gas terminates well within the cloud, short of the most distant HH objects of the optical flow. Contamination from an unrelated cloud along the same line of sight prevents a thorough study of the blueshifted outflow lobe and the mass distribution at the lowest velocities in both lobes. The cloud core in which Haro~6-10 is embedded is filamentary and flattened in the east-west direction. The total cloud mass is calculated from 13CO(1-0) to be ~200Msun. The lower limit of the mass associated with the outflow is ~0.25Msun.Comment: ApJ Accepted; 9 pages, 8 figures. For high resolution ps file use: http://www.astro.umass.edu/~irena/haro.p