A study of the relationship between macroscopic measures and physical processes occurring during crack closure

Issued as Fiscal year report, Annual reports [nos. 1-3], and Final report, Project E-18-665 (subproject: E-18-666

Coming From Good Stock: Career Histories and New Venture Formation

We examine how the social structure of existing organizations influences entrepreneurship and suggest that resources accrue to entrepreneurs based on the structural position of their prior employers. We argue that information advantages allow individuals from entrepreneurially prominent prior firms to identify new opportunities. Entrepreneurial prominence also reduces the perceived uncertainty of a new venture. Using a sample of Silicon Valley start-ups, we demonstrate that entrepreneurial prominence is associated with initial strategy and the probability of attracting external financing. New ventures with high prominence are more likely to be innovators; furthermore, innovators with high prominence are more likely to obtain financing

Does Partnering Pay Off? - Stock Market Reactions to Inter-Firm Collaboration Announcements in Germany

The dramatic increase in interorganizational partnering in the last two decades raises questions for scholars and managers regarding the value impact of inter-firm collaborations. Using event study methodology, this paper tests whether stock market reactions differ when a collaboration formation or termination is announced. In addition, the study provides an in-depth analysis of potential determinants of stock market reactions to collaboration formation announcements. The sample consists of 1037 announcements in German stock markets from 1997 to 2002. The results show that an unexpected termination announcement decreases firm valuation, and a formation announcement increases firm valuation. Further, certain collaborations are more favorable than others, depending on firm industry, age, size, collaboration constellations, and equity versus non-equity investment in partner firm. The results open avenues for further research on partnering strategies

Board structure, ownership structure and firm performance: A study of New Zealand listed-firms

This paper investigates the role of board structure and the effect of ownership structures on firm performance in New Zealand's listed firms. Several studies, the majority from the U.S., U.K. and Japan, have examined the relationship between corporate governance mechanisms, ownership structure and firm performance. Those studies yielded different results, affected by the nature of the prevailing governance system for each country. Investigating New Zealand's listed firms could enhance the diversity of the growing body of work that examines this relationship. Though the majority of studies only tested a linear relationship between variables, a number of studies have found a non-linear relationship between board structures, ownership structures and firm performance, and this study confirms the non-linear relationship. Using a balanced panel of 79 New Zealand listed firms, this study employs a Generalised Linear Model (GLM) for robustness. The result reveals that board of directors, board committees, and managerial ownership have a positive and significant impact on firm performance. Meanwhile, nonexecutive directors, female directors on the board and blockholder ownership lower New Zealand firm performance

Costs of colour change in fish: food intake and behavioural decisions

Many animals, particularly reptiles, amphibians, fish and cephalopods, have the ability to change their body colour, for functions including thermoregulation, signalling and predator avoidance. Many fish plastically darken their body colouration in response to dark visual backgrounds, and this functions to reduce predation risk. Here, we tested the hypotheses that colour change in fish (1) carries with it an energetic cost and (2) affects subsequent shoal and habitat choice decisions. We demonstrate that guppies (Poecilia reticulata) change colour in response to dark and light visual backgrounds, and that doing so carries an energetic cost in terms of food consumption. By increasing food intake, however, guppies are able to maintain growth rates and meet the energetic costs of changing colour. Following colour change, fish preferentially choose habitats and shoals that match their own body colouration, and maximise crypsis, thus avoiding the need for further colour change but also potentially paying an opportunity cost associated with restriction to particular habitats and social associates. Thus, colour change to match the background is complemented by behavioural strategies, which should act to maximise fitness in variable environments. © 2013. Published by The Company of Biologists Ltd

Can Employee Share-Ownership Improve Employee Attitudes and Behaviour?

Purpose: To examine the outcomes of a substantial broad-based employee share-ownership scheme for employee attitudes and behaviour in a privatised firm. Methodology: Results are based on a survey of 711 employees in Eircom, an Irish telecommunications firm, which is 35 percent employee-owned. Findings: The ESOP has created sizable financial returns and has had extensive influence in firm governance at the strategic level. However, findings show only a limited impact on employee attitudes and behaviour. This is attributed to a failure in creating a sense of employee participation and line of sight between employee performance and reward. Originality: Little research has examined the impact of a large employee shareholding on attitudes and behaviour within a public-quoted firm. The substantial and unparalleled size of the Eircom ESOP presented a unique opportunity to conduct such a study. Policy implications: The aim of employee share-ownership often includes aligning employee objectives with those of other shareholders, and thus improving labour performance. The findings in this study highlight a need to provide employees with a sense of ownership and control. Findings also question the assumption that where employees have a substantial shareholding, they will focus on securing the long-term prospects of the firm

Inverse optimal transport

Discrete optimal transportation problems arise in various contexts in engineering, the sciences and the social sciences. Often the underlying cost criterion is unknown, or only partly known, and the observed optimal solutions are corrupted by noise. In this paper we propose a systematic approach to infer unknown costs from noisy observations of optimal transportation plans. The algorithm requires only the ability to solve the forward optimal transport problem, which is a linear program, and to generate random numbers. It has a Bayesian interpretation, and may also be viewed as a form of stochastic optimization. We illustrate the developed methodologies using the example of international migration flows. Reported migration flow data captures (noisily) the number of individuals moving from one country to another in a given period of time. It can be interpreted as a noisy observation of an optimal transportation map, with costs related to the geographical position of countries. We use a graph-based formulation of the problem, with countries at the nodes of graphs and non-zero weighted adjacencies only on edges between countries which share a border. We use the proposed algorithm to estimate the weights, which represent cost of transition, and to quantify uncertainty in these weights