Sperm play a pivotal role in determining the reproductive success of individuals whose sperm must compete directly with that of others. I used sperm precedence assays and experimental evolution to examine the role of sperm traits in the reproductive success of hermaphrodites and males in the androdioecious nematode Caenorhabditis elegans. First, sperm size and the rate of reproduction were analyzed, in the context of male-male sperm competition, for evidence of natural heritable variation. Sperm size proved to be a strong indicator of second-male sperm precedence in the genotypes examined. Second, I tested the theoretically predicted effect of larval development time on the number of self-sperm produced by hermaphrodites. I demonstrated that a short larval development period favored the evolution of fewer sperm, inline with theoretical predictions. These results provide important insights into C. elegans reproductive biology and more generally to our understanding of the evolution of reproductive systems.

Most mobile phones in Canada contain software that prevents the consumer from using the phone on multiple networks. This is known as a ‘software lock’, and is installed prior to the point of sale by the mobile service providers. As of 2011, all three large Canadian service providers have adopted a similar practice to charge a fee to remove the software lock from phones. This fee applies even after the consumer’s service contract with the provider ends. This thesis examines whether the practice of charging consumer a fee for removing the software lock after the contract expires is anti-competitive in Canada. Through examining economic theory and undergoing legal analysis, this thesis will argue that while the practice is clearly anti-competitive, it does not substantially lessen competition enough to be prevented under competition law. This thesis suggests that this industry practice should be prohibited through the passing of consumer protection legislation.

Most mobile phones in Canada contain software that prevents the consumer from using the phone on multiple networks. This is known as a ‘software lock’, and is installed prior to the point of sale by the mobile service providers. As of 2011, all three large Canadian service providers have adopted a similar practice to charge a fee to remove the software lock from phones. This fee applies even after the consumer’s service contract with the provider ends. This thesis examines whether the practice of charging consumer a fee for removing the software lock after the contract expires is anti-competitive in Canada. Through examining economic theory and undergoing legal analysis, this thesis will argue that while the practice is clearly anti-competitive, it does not substantially lessen competition enough to be prevented under competition law. This thesis suggests that this industry practice should be prohibited through the passing of consumer protection legislation.

Sperm play a pivotal role in determining the reproductive success of individuals whose sperm must compete directly with that of others. I used sperm precedence assays and experimental evolution to examine the role of sperm traits in the reproductive success of hermaphrodites and males in the androdioecious nematode Caenorhabditis elegans. First, sperm size and the rate of reproduction were analyzed, in the context of male-male sperm competition, for evidence of natural heritable variation. Sperm size proved to be a strong indicator of second-male sperm precedence in the genotypes examined. Second, I tested the theoretically predicted effect of larval development time on the number of self-sperm produced by hermaphrodites. I demonstrated that a short larval development period favored the evolution of fewer sperm, inline with theoretical predictions. These results provide important insights into C. elegans reproductive biology and more generally to our understanding of the evolution of reproductive systems.

Recently, some authors point to value creation from the structure and behaviours associated with competition and collaboration inside the organisation (Helfat and Eisenhardt, 2004; Birkinshaw and Lingblad, 2005). While both competition and collaboration have been studied extensively between organisations, less attention has been focused on them and their interaction between units inside the organisation, particularly within complex and heterogeneous multinational corporations. The question is how to achieve the coordination and collaboration that is necessary for a multinational organisation to reap the benefits that international expansion has to offer and yet balance the propensity for competition that exists as business units struggle for scarce resources or new opportunities. In order to answer this question, the aim of this review is to first of all know what the factors and mechanisms are that influence competition and collaboration between organisational units within multinational organisations. Methodology: This study has been conducted using a systematic review methodology with the aim of producing a search of extant literature which can be trusted by others as being thorough, transparent, replicable and clear. Both quantitative and qualitative techniques have been used to achieve this. Findings: This review finds that the there is minimal extant literature that addresses competition and collaboration between business units within the multinational corporation and that it also fails to provide a comprehensive understanding of the factors and mechanisms that influence the co-existence of intraorganisational competition and collaboration. They are typically viewed as mutually exclusive or at opposite ends of a continuum. While there has been some recent research attention given to intraorganisational collaboration and competition, each in their own right, there has not been an extensive review of the factors and mechanisms when looking at their coexistence within the multinational corporate environment. By bringing the two literatures into view and investigating the paradoxical nature of the influences on andthe interactions between competition and collaboration, insights into an optimal mix based on the corporations strategy and value creation logic can be gained for both academics and business unit leaders.

Technological position is a dimension along which organizations can either differentiate from or mimic the behavior of other organizations in the technological landscape. This paper is aimed at providing empirical evidence of the specific ways in which an organization’s technological position choice is impacted by the tension that arises from technological co-location; the information available to the focal firm; and the focal firm’s usage of such information. In this dissertation I examine the factors influencing technological agglomerations in technological positions in the technological landscape. I further examine how the organization’s experience impacts its strategic positioning choice while facing the tradeoff between the expected derivatives of co-location - opportunities and competition. I argue and find that an organization strategically positions itself in the technological landscape based not only on the information it has gathered on its technological environment but also using its own experience and information. Further, my findings show that the organization’s technological positioning choice reflects the tension between opportunity and competition, which questions the notion of isomorphism.

Reforms that expand school choice have been the focus of considerable policy interest, not least as a possible means of improving public school performance. According to the standard argument, increased choice will intensify competition, forcing public schools to improve quality in order to retain enrolment. Yet in principle, increased choice need not always raise performance, pointing to the need for careful empirical analysis. A key challenge in measuring the effects of greater choice on school performance is that convincing variation in choice is often hard to come by, especially in cross-sectional studies. And while school choice policy experiments have the advantage that choice increases in a clear way, few large-scale school choice policies have been implemented in North America. An important exception is the 2002 Ontario tuition tax credit, which eased access to private schools throughout Canada's most populous province. Analyzing the effects of the tax credit reform provides the focus of this thesis. The thesis begins by presenting the literature and gaps in existing research. The next chapter presents a model to clarify the link between increases in competition and school performance, and to motivate the empirical identification strategy. To set the stage for the main empirical analysis, I also provide some relevant institutional background relating to the Ontario education policy environment and the Ontario tuition tax credit as well as a descriptive analysis on the Ontario private school market. I then present an initial examination of the possible performance effects of the Ontario tuition tax credit using a difference-in-differences setup, before turning to the main empirical analysis, which exploits the differential competitive effects for public schools in districts with relative to those without a significant private school presence. The empirical results indicate that public school performance improved for schools facing the greatest competitive pressures following the introduction of the policy, controlling for a host of other relevant factors. To assess whether the effect is due primarily to increases in productivity, the analysis controls carefully for a series of alternative mechanisms. Overall, the Ontario findings are consistent with increased choice giving rise to productivity improvements in public schools.

The North Mountain of the Annapolis Valley, NS, in eastern Canada, is a ~200 km basalt ridge drained by many small first or second order streams in independent catchments. The area is fairly uniform geologically, presenting an opportunity to compare streams of similar chemistry, slope and aspect, that vary in other respects, such as invertebrate community structure. In this thesis, I examine two macroinvertebrate functional groups to determine key factors influencing their abundance, composition and diversity across catchments. Chapters 2 and 3 are concerned with the predatory invertebrate guild in eight of the streams, in two groups separated by ~65 km. In Chapter 2, I assessed factors influencing composition of the predator guild using similarity matrices. Similarity in predator composition declined with distance, and streams that were more similar in disturbance (spates) were more similar in predator composition. Similarity within one family, Rhyacophilidae, was related to similarity in fish population. Chapter 3 reports the results of laboratory experiments involving two widespread species. Field data suggested an asymmetric interaction between Sweltsa onkos (Plecoptera: Chloroperlidae) and Rhyacophila vibox (Trichoptera: Rhyacophilidae); behavioural observations in artificial streams supported this. In the presence of R. vibox, S. onkos had higher mortality and injury rates, and grew less. The results of these chapters suggest that, although disturbance is important in shaping community structure, the results of interspecific interactions can be detected at large scales. S. onkos can only attain high numbers in streams where fish predation reduces the abundance of R. vibox. Chapter 4 examines biodiversity patterns in the macroinvertebrate detritivore guild in 25 streams encompassing ~80 km of the ridge. Using density and richness of the detritivore community, detrital resource quantity, and top predator abundance, I looked for evidence in support of several mechanisms that can lead to positive species-energy relationships. Patterns conformed to expectations of the More Individuals Hypothesis. It appears that taxonomic richness of the detritivore guild increases with detrital resource availability because more taxa can attain their minimum viable population size where more resources are available.

Increased knowledge of plant interactions is important for our understanding of how ecosystems will respond to climate changes. Using four common low-herb and three tall- herb species as phytometers I measured the net outcome of plant interactions in an alpine environment by a neighbour removal experiment. Grazing and climate were tested as explanatory factors for differences in the outcome of plant interactions, with two altitudes representing different climates. The most important finding in this experiment is that competition is the dominating interaction among plants in this habitat, regardless of plant size, climate and grazing. Climatic exposure and grazing only influenced tall-herb species while low-herbs were mainly limited by competition, presumably for light. These results are important since facilitative interactions and net facilitation in plant communities are often reported to become more common in severe climates.

This study describes the behavior of four important international construction companies within the Czech construction market. The chosen companies are following: SKANSKA CS, STRABAG, HOCHTIEF CZ and OHL ZS. The theoretical part of this paper dissertates about various methods suitable for market analyses, such as strategic maps or Porter´s diagram and foreign market entry modes in general. The practical part begins with the general description of the Czech construction market and its history. The SWOT analysis of the Czech construction market also anticipates the future development of the Czech construction market in following five years. The next chapters are devoted to the detailed description of chosen companies. The history and profile of the chosen international concerns and of the traditional Czech companies are described in this chapter. This part also characterizes the takeovers of Czech companies by international concerns of SKANSKA CS, STRABAG, HOCHTIEF CZ and OHL ŽS and their following development on the Czech construction market. From the detailed description, economic data with the most predicative significance were chosen. This data was subsequently compared in the penultimate part of the study. The Economic data such as sales, profit, return on sales, number of employees, sales on employee and growth of the companies are significant for the comparison. The graphs clearly show the development of the companies since 2000. The results of the analyses are concluded in the last chapter, which also contains a suggestion for the possible future research.