Enriching a Theory of Wage and Promotion Dynamics Inside Firms

In previous work we showed that a model that integrates job assignment, human-capital acquisition, and learning can explain several empirical findings concerning wage and promotion dynamics inside firms. In this paper we extend that model in two ways. First, we incorporate schooling into the model and derive a number of testable implications that we then compare with the available empirical evidence. Second, and more important, we show that introducing task-specific' human capital allows us to produce cohort effects (i.e., the finding that a cohort that enters a firm at a low wage will continue to earn below-average wages years later). We argue that task-specific human capital is a realistic concept and may have many important implications. We also discuss limitations of our (extended) approach.

WHAT IS A HERPETOLOGIST AND HOW CAN I BECOME ONE?

The following is the first in the JNAH series in which we address a variety of topics on herpetology based on essays from our upcoming book “How to Be a Herpetologist,”. We will also answer frequently asked questions we and other professional herpetologists receive from students, colleagues, and the general public about herpetology as a career or an avocation

Seminatrix, S. pygaea

Number of Pages: 5Integrative BiologyGeological Science

An analysis of contributory effects of teamwork characteristics within collegiate basketball and football

Few empirical studies have investigated the overall contribution of teamwork characteristics to collegiate sport team success. Additionally, there is little evidence determining the collective effects of teamwork characteristics among NCAA divisions of competition. The purpose of this research was to explore the relationships between six teamwork characteristics and successful teamwork within collegiate basketball and football. Subjects, comprised of 124 NCAA head football coaches and 95 head basketball coaches, returned self-reported questionnaires for the study. MANOVA, t-tests and Tukey\u27s Honestly Significant Difference tests were conducted on the subscales and determined that teamwork scores differ between the two sports. The results suggested that goal clarity and expert leadership were the primary contributors to overall teamwork scores within both sports and all levels of competition (p {dollar}\u3c{dollar}.05). Individual sport- and division-specific analyses also determined that the teamwork characteristics emerge in different quantities between the sports and among the divisions studied

Master of Science

thesisThis research evaluated both corroded and noncorroded reinforced concrete (RC) columns in axial compression. Carbon fiber reinforced polymer (CFRP) jackets were shown to successfully rehabilitate severely corroded steel RC columns subjected to axial compression by doubling the compressive strength and quadrupling the axial strain at peak load of the noncorroded control specimens. Current design and analytical FRP confined concrete models were implemented and were found to compare well with experimental results. The closest predictions were obtained when accounting for additional confinement provided by the internal steel spiral. Other internal reinforcing including hybrid, which is a combination of vertical steel with a GFRP spiral , and all-GFRP RC columns were also tested in axial compression. This is the first time a GFRP spiral has been tested to my knowledge. An evaluation of the corrosion rates showed that the hybrid RC specimens corroded at less than 1/3 the rate of the all-steel RC specimens. The hybrid RC specimens subjected to corrosion also had approximately double the axial strain at peak load of the corroded all-steel RC specimens and showed more ductility after peak load. Two field aged bridge columns that were in service for over 40 years, with 9 of those years rehabilitated with CFRP jackets, were tested for bond under 2,000 kip concentric and eccentric loads and the bond was maintained when the substrate had been the original concrete

On de-Sitter geometry in crater statistics

The cumulative size-frequency distributions of impact craters on planetary bodies in the solar system appear to approximate a universal inverse square power-law for small crater radii. In this article, we show how this distribution can be understood easily in terms of geometrical statistics, using a de-Sitter geometry of the configuration space of circles on the Euclidean plane and on the unit sphere. The effect of crater overlap is also considered.Comment: 6 pages, 2 figures, accepted by MNRAS. Version 2: title modified, appendix added, some small change

Rational combinations of Betti diagrams of complete intersections

We investigate decompositions of Betti diagrams over a polynomial ring within the framework of Boij-S\"oderberg theory. That is, given a Betti diagram, we determine if it is possible to decompose it into the Betti diagrams of complete intersections. To do so, we determine the extremal rays of the cone generated by the diagrams of complete intersections and provide a rudimentary algorithm for decomposition.Comment: This research was conducted at the Willamette Mathematics Consortium RE