Texas Christian University

About: Texas Christian University is a education organization based out in Fort Worth, Texas, United States. It is known for research contribution in the topics: Population & Poison control. The organization has 3245 authors who have published 8258 publications receiving 282216 citations. The organization is also known as: TCU & Texas Christian University, TCU.

The downside of being ‘up’: entrepreneurs' dispositional positive affect and firm performance

Abstract: Previous research indicates that dispositional positive affect (DPA) is related to many beneficial outcomes (e.g., enhanced career success, development of high-quality social networks, improved performance on many tasks). Past research, however, has not directly investigated three crucial issues: (1) Are there limits to these beneficial effects? (2) Is dispositional positive affect related to firm performance as well as to individual entrepreneur performance? (3) Are the effects of entrepreneurs' DPA moderated by specific variables? The present study provides evidence relating to these issues. Findings indicate significant relationships between entrepreneurs' DPA and two measures of firm performance (product innovation and sales growth rate). However, there are indeed limits to these effects, such that beyond certain upper bounds, further increments in entrepreneurs' DPA are associated with declines in firm performance. These effects are moderated by firm size, such that the negative effects of entrepreneurs' DPA are stronger in small firms than in comparatively larger ones. Results contribute to the development of theory for understanding the role of entrepreneurs' affect in the entrepreneurial process. More generally, they contribute to ongoing efforts to understand how founding entrepreneurs influence the subsequent development and growth of their firms. Copyright © 2011 Strategic Management Society.

Pattern and process in the evolution of learning

Abstract: A century after E. L. Thorndike's (1898) dissertation on the comparative psychology of learning, the field seems ready for a reassessment of its metatheoretical foundations. The stability of learning phenotypes across species is shown to be similar to that of other biological characters, both genotypic (e.g., Hox genes) and phenotypic (e.g., vertebrate brain structure). Moreover, an analysis of some current lines of comparative research indicates that researchers use similar strategies when approaching problems from either an ecological view (emphasizing adaptive significance) or a general-process view (emphasizing commonality across species). An integration of learning and evolution requires the development of criteria for recognizing and studying the divergence, homology, and homoplasy of learning mechanisms, much as it is done in other branches of biological research.

Implications of Proposed Segment Reporting Standards for Financial Analysts? Investment Judgments

Abstract: This paper reports results from an experiment which provide evidence on how certain provisions of current and revised segment reporting standards affect financial analysts? judgments. Specifically, we examine the effect of two alternative approaches to segment definition: segments defined by grouping similar products (similarity approach) and segments defined by a company?s internal reporting classification (management approach). The first approach is used currently under SFAS No. 14 as the basis for determining externally-reported segments, while the second approach will be used after December 15, 1997, the effective date of the FASB?s new segment reporting standard, SFAS No. 131, Disclosures about Segments of an Enterprise and Related Information. Results show that analysts perceived segment reporting to be more reliable when similar products were combined in a segment (SFAS No. 14) than when dissimilar products were combined, and when external segments were the same as those used internally (SFAS No. 131) than when external and internal segments differed. Analysts? confidence in their earnings forecasts and stock valuation judgments was affected by the interaction of the similarity and management approaches. As long as external segments were the same as internal segments, analysts? confidence was not affected by whether products combined in a segment were similar or dissimilar. In contrast, if external and internal segments differed, analysts had greater confidence in their judgments when similar products were combined in a segment than when dissimilar products were combined. These results support the FASB?s position that the management approach will positively affect analysts? perceptions of the reliability of segment data. In addition, our results suggest that, in certain cases, the management approach will enhance analysts? confidence in reported segment data.

IN-SYNC I: Homogeneous stellar parameters from high-resolution apogee spectra for thousands of pre-main sequence stars

Abstract: Over two years, 8859 high-resolution H-band spectra of 3493 young (1-10 Myr) stars were gathered by the multi-object spectrograph of the APOGEE project as part of the IN-SYNC ancillary program of the SDSS-III survey. Here we present the forward modeling approach used to derive effective temperatures, surface gravities, radial velocities, rotational velocities, and H-band veiling from these near-infrared spectra. We discuss in detail the statistical and systematic uncertainties in these stellar parameters. In addition, we present accurate extinctions by measuring the E(J – H) of these young stars with respect to the single-star photometric locus in the Pleiades. Finally, we identify an intrinsic stellar radius spread of about 25% for late-type stars in IC 348 using three (nearly) independent measures of stellar radius, namely, the extinction-corrected J-band magnitude, the surface gravity, and the Rsin i from the rotational velocities and literature rotation periods. We exclude that this spread is caused by uncertainties in the stellar parameters by showing that the three estimators of stellar radius are correlated, so that brighter stars tend to have lower surface gravities and larger Rsin i than fainter stars at the same effective temperature. Tables providing the spectral and photometric parameters for the Pleiades andmore » IC 348 have been provided online.« less