<p>This paper deals with the economic development of Tanzania and especially with the development of the smallholders. My aim is to study whether the Structural Adjustment Programmes have helped to facilitate growth in the agricultural and export-sector and if the reforms implemented through the programmes have made agricultural specialization easier and improved the economic situation for the smallholders.</p><p>In this paper, I will discuss that there might be significant limitations in the favours received due to SAP and that the Structural Adjustment Programmes because of this may not be the model for agricultural development as it is claimed by the initiators; the World Bank and the IMF. On the contrary, I present the idea that SAP can be said to have failed in its undertaking and that the reforms might not be suitable for the smallholder sector. I will in the paper argue that SAP has not facilitated an agricultural specialization and that this has much to do with the increase of production costs that the smallholders have been faced with after the reforms. And because of this it could be argued that the Structural Adjustment Programmes might not be an appropriate development strategy for Tanzania, if the country is to achieve growth through specialization. Consequently, there might be reason to believe that the reforms not are overall suitable for the Tanzanian development, considering that a growth within the agricultural smallholder sector is crucial for Tanzania to achieve a long term economic growth.</p>

The thesis identifies and discusses the changing structure of international trade and specialization in the industries of cars and heavy trucks. The main contribution of the thesis is that it discusses the patterns from the perspective of the car industry with the similar but in some aspects different industry of heavy trucks as a contrasting example. This method aims at giving more knowledge about the varying challenges that different industries face in a globalized economy. To authors’ knowledge such a direct comparison has not yet been done. Some results presented in the study is that while car producers compete on a global scale the producers of heavy trucks does it on a regional scale. For the OECD 23 car producing countries, this implies competition from producers in countries with low factor input costs. This is probably one of the reasons why OECD 23 car producers have raised the export value or their goods relatively more than the producers of heavy trucks. The thesis also reveals how the patterns of export and specialization have shifted dramatically in both industries.

This paper deals with the economic development of Tanzania and especially with the development of the smallholders. My aim is to study whether the Structural Adjustment Programmes have helped to facilitate growth in the agricultural and export-sector and if the reforms implemented through the programmes have made agricultural specialization easier and improved the economic situation for the smallholders. In this paper, I will discuss that there might be significant limitations in the favours received due to SAP and that the Structural Adjustment Programmes because of this may not be the model for agricultural development as it is claimed by the initiators; the World Bank and the IMF. On the contrary, I present the idea that SAP can be said to have failed in its undertaking and that the reforms might not be suitable for the smallholder sector. I will in the paper argue that SAP has not facilitated an agricultural specialization and that this has much to do with the increase of production costs that the smallholders have been faced with after the reforms. And because of this it could be argued that the Structural Adjustment Programmes might not be an appropriate development strategy for Tanzania, if the country is to achieve growth through specialization. Consequently, there might be reason to believe that the reforms not are overall suitable for the Tanzanian development, considering that a growth within the agricultural smallholder sector is crucial for Tanzania to achieve a long term economic growth.

<p>Habitat fragmentation and anthropogenic development influence the level of isolation and security in and around protected habitats affecting wolf movements and the distribution and abundance of their prey. In light of recent concern about the ecology of animals in protected areas, I initiated a research project to investigate the molecular and foraging ecology of grey wolves in and around Prince Albert National Park (PANP), Saskatchewan. <p>Estimates of genetic diversity and population structure can be used as surrogates to detect effects of habitat degradation on wolves. Genetic diversity was high in these populations relative to other North American wolf populations. My results suggest that wolves in central Saskatchewan form a panmictic population, however there is some evidence showing partial isolation of one group of wolves within PANP. I speculate that the level of human activity such as road networks, hunting, and trapping act as dispersal impediments to this isolated group. Further, the genetic homogenization, indicating high population turnover, of wolf groups that use the periphery and adjacent areas of PANP may also contribute to the observed genetic subdivision. The partially isolated NW group, characterized by slightly lower diversity indices, low migration rates, and higher levels of allele fixation, indicated this group was a more stable social unit comprised of more related individuals.</p><p>Knowledge of wolf food habits and how they change over time is a fundamental component to understanding wolf ecology. Using scat analysis I evaluated wolf foraging ecology by calculating indices of occurrence/faeces (OF) and percent prey biomass contribution: white tailed deer contributed 43% and 33% respectively to wolf diet; elk (33%, 50%), moose (7%, 14%), beaver (5%, 2%), and snowshoe hare (2%, <1%). I found no evidence of livestock depredation nor did wolves prey on bison or caribou. There were no differences in OF indices between years. Prey selectivity was apparent in both years with wolves selecting elk and avoiding beaver. A diversity of ungulate prey are readily available to wolves in this system; however, scat analysis and tests for prey selection indicate a preference for elk. I presume this is a choice made to balance risk with profitability of food items in concordance with optimal foraging theory.</p><p>I examined trophic relationships between the grey wolf and 18 mammalian species from the boreal forest of central Saskatchewan, Canada, using ä13C and ä15N stable isotope values measured in hair samples. Variance in isotope values for wolves and other carnivores was investigated as a proxy for dietary variation. IsoSource, an isotopic source partitioning model, quantified the relative proportions of 5 most likely prey items in the diets of wolves.</p><p>I compared these results with investigations of faecal contents using percent biomass contributions of prey items in wolf diet. I found no difference between percent biomass measures and mean percent contributions derived from IsoSource. Despite social foraging, my results indicate highly variable diets among individual wolves and I discuss this in terms of boreal wolf ecology.

<p>Habitat fragmentation and anthropogenic development influence the level of isolation and security in and around protected habitats affecting wolf movements and the distribution and abundance of their prey. In light of recent concern about the ecology of animals in protected areas, I initiated a research project to investigate the molecular and foraging ecology of grey wolves in and around Prince Albert National Park (PANP), Saskatchewan. <p>Estimates of genetic diversity and population structure can be used as surrogates to detect effects of habitat degradation on wolves. Genetic diversity was high in these populations relative to other North American wolf populations. My results suggest that wolves in central Saskatchewan form a panmictic population, however there is some evidence showing partial isolation of one group of wolves within PANP. I speculate that the level of human activity such as road networks, hunting, and trapping act as dispersal impediments to this isolated group. Further, the genetic homogenization, indicating high population turnover, of wolf groups that use the periphery and adjacent areas of PANP may also contribute to the observed genetic subdivision. The partially isolated NW group, characterized by slightly lower diversity indices, low migration rates, and higher levels of allele fixation, indicated this group was a more stable social unit comprised of more related individuals.</p><p>Knowledge of wolf food habits and how they change over time is a fundamental component to understanding wolf ecology. Using scat analysis I evaluated wolf foraging ecology by calculating indices of occurrence/faeces (OF) and percent prey biomass contribution: white tailed deer contributed 43% and 33% respectively to wolf diet; elk (33%, 50%), moose (7%, 14%), beaver (5%, 2%), and snowshoe hare (2%, <1%). I found no evidence of livestock depredation nor did wolves prey on bison or caribou. There were no differences in OF indices between years. Prey selectivity was apparent in both years with wolves selecting elk and avoiding beaver. A diversity of ungulate prey are readily available to wolves in this system; however, scat analysis and tests for prey selection indicate a preference for elk. I presume this is a choice made to balance risk with profitability of food items in concordance with optimal foraging theory.</p><p>I examined trophic relationships between the grey wolf and 18 mammalian species from the boreal forest of central Saskatchewan, Canada, using ä13C and ä15N stable isotope values measured in hair samples. Variance in isotope values for wolves and other carnivores was investigated as a proxy for dietary variation. IsoSource, an isotopic source partitioning model, quantified the relative proportions of 5 most likely prey items in the diets of wolves.</p><p>I compared these results with investigations of faecal contents using percent biomass contributions of prey items in wolf diet. I found no difference between percent biomass measures and mean percent contributions derived from IsoSource. Despite social foraging, my results indicate highly variable diets among individual wolves and I discuss this in terms of boreal wolf ecology.

ABSTRACT This dissertation constructs three strategic trade models. The first model is a single-shot two-stage game model of intra-industry trade with trade retaliation against government provided export subsidies and lobbying by foreign firm on domestic government¡¦s import tariff. The second model is an infinite repeated game model of intra-industry where the history of government and firm interaction is the basis for constructing trade strategies. The third model is a single-shot three-stage game model of intra-industry trade with the linkage between domestic and foreign intermediate-input and final-good industries and the choice of optimal export subsidies in the two industries for two governments. Chapter 1 introduces the motivation, objectives, framework, and literature review of this dissertation. The literature review is organized as follows. Initially we review the foundations of the basic intra-industry trade model, where our model is rooted. Next we present the more significant papers that describe the sensitivity of the basic model, because our repeated game model will show yet another way that the basic model is sensitive. Next we present some dynamic game theoretic results, which we use to construct our repeated game model. Finally, we review some papers related to intermediate input and strategic trade. The first model is developed in Chapter 2. We discover that there are two perfect strategy subgame perfect equilibria in this model. And then an import tariff is available, and using that tariff will remove the benefits originally conferred by an export subsidy. Active trade policy is not eliminated by the two governments and tariff policy is larger than subsidy policy. Hence, an import tariff will more than offset the anticipated gains from a subsidy policy. There is no reason to believe that one equilibrium is better or more likely than another, because the highest payoffs equilibrium of the two governments and domestic firm is not the best payoff equilibrium of the foreign firm. We used the single-shot game model of Chapter 2 and molded it into a repeated game in Chapter 3. First, we found the set of Nash equilibria toward solving the repeated game model. Second, we only focused on the subgame perfect equilibria from the infinite Nash equilibria¡¦s set. We used the result in Fudenberg and Maskin (1986) to define the subgame perfect equilibria. Third, we showed that in the repeated game a subgame perfect strategy of free trade can increase all players¡¦ payoffs which are better than the single-shot game equilibrium payoffs. Chapter 4 develops the third model. We observe how domestic and foreign governments choose their optimum export subsidy policies for their intermediate input and final good production by using the linkage between domestic and foreign intermediate-input and final-good industries under the condition of vertical specialization. The result indicates that under the condition of vertical specialization, the two governments will choose positive export subsidies for their final goods while they will give no subsidies for their intermediate inputs. Chapter 5 presented the implications of vertical specialization on the cross-strait economy and trade. To maintain the competitive advantage of Taiwan economy and smoothly upgrade industry structure, transferring the labor-intensive industry and the labor-intensive production sections to China seems an optimum choice under the principle of comparative advantages. Nevertheless, for Taiwan, the upgrade of local industries has never stopped, but with the acceleration of industrial relocation, the transformation of production and trade structures are also taking place. The impact carried by this transformation is extensive and profound. In addition to obvious impact on the economic perspective, if the structure of employment market cannot react in time, a great social cost may be incurred. How to utilize the edge of industrial specialization between the Strait to strengthen Taiwanese industries¡¦ competitive, enhance product development ability through cooperation with multinational enterprises, dominate product development, and establish a center of task division for regional industries can be one of the main focuses in the development of Taiwan¡¦s industrial policy.

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<p>The thesis identifies and discusses the changing structure of international trade and specialization in the industries of cars and heavy trucks. The main contribution of the thesis is that it discusses the patterns from the perspective of the car industry with the similar but in some aspects different industry of heavy trucks as a contrasting example. This method aims at giving more knowledge about the varying challenges that different industries face in a globalized economy. To authors’ knowledge such a direct comparison has not yet been done. Some results presented in the study is that while car producers compete on a global scale the producers of heavy trucks does it on a regional scale. For the OECD 23 car producing countries, this implies competition from producers in countries with low factor input costs. This is probably one of the reasons why OECD 23 car producers have raised the export value or their goods relatively more than the producers of heavy trucks. The thesis also reveals how the patterns of export and specialization have shifted dramatically in both industries.</p>

The fitness of any evolutionary unit can be understood in terms of its two basic components: fecundity and viability. The trade-offs between these fitness components drive the evolution of a variety of life-history traits in extant multicellular lineages. Here, I show evidence that the evolution of germ-soma separation and the emergence of individuality at a higher level during the unicellular-multicellular transition are also consequences of these trade-offs. The transition from unicellular to larger multicellular organisms has benefits, costs, and requirements. I argue that germ-soma separation evolved as a means to counteract the increasing costs and requirements of larger multicellular colonies. Volvocalean green algae are uniquely suited for studying this transition since they range from unicells to undifferentiated colonies, to multicellular individuals with complete germ-soma separation. In these flagellated organisms, the increase in cell specialization observed as colony size increases can be explained in terms of increased requirements for self-propulsion and to avoid sinking. The collective flagellar beating also serves to enhance molecular transport of nutrients and wastes. Standard hydrodynamic measurements and concepts are used to analyze motility (self-propulsion) and its consequences for different degrees of cell specialization in the Volvocales as colony size increases. This approach is used to calculate the physical hydrodynamic limits on motility to the spheroid colony design. To test the importance of collective flagellar beating on nutrient uptake, the effect of advective dynamics on the productivity of large colonies is quantified. I conclude first, that when colony size exceeds a threshold, a specialized and sterile soma must evolve, and the somatic to reproductive cell ratio must increase as colony size increases to keep colonies buoyant and motile. Second, larger colonies have higher motility capabilities with increased germ-soma specialization due to an enhancement of colony design. Third, advection has a significant effect on the productivity of large colonies. And fourth, there are clear trade-offs between investing in reproduction, increasing colony size (i.e. colony radius), and motility. This work shows that the evolution of cell specialization is the expected outcome of reducing the cost of reproduction in order to realize the benefits associated with increasing size.

According to Naudé and Krugell (2003a) South Africa's cities are too small, dispersed, and over concentrated. In South Africa, households in the country's urban areas have average incomes almost thrice as high as the households in rural areas. More than 70% of South Africa's GDP is produced in only 19 urban areas (Naudé and Krugell 2003b). In Naudé and Krugell (2003a) it is stated that the rank-size rule shows that South Africa's urban agglomerations are too small and the cities mainly offer urbanization economies rather than localization economies. The main focus of this study will be looking at the specialization and diversity of South African cities. The aim is to determine whether certain cities should specialise in certain sectors, which they are currently involved in or should they add to their city and become more diverse and specialize in other sectors in order to promote economic growth. Many believe that a city which is more diverse would grow faster than a city specialising in a certain and thus be more beneficial to the economy than a specialized city would. This paper would like to address this phenomenon with regard to South African cities / Thesis (M.Com. (Economics))--North-West University, Potchefstroom Campus, 2006.