This thesis studies the efficient organisation of economic institutions. In the first chapter we analyse how foreign direct investment projects can generate spillovers through backward linkages. An investment project can generate such spillovers if local competitors in the project's own industry can benefit from the upstream efficiency improvements that were induced by the entry of the foreign firm. The existence of the spillover effect depends crucially on the supplier arrangement that is chosen by the foreign firm. The foreign firm could avoid the spillover effect by producing the input itself or by contracting with only a small number of local suppliers. We use an incomplete contract framework to study the conditions under which the foreign firm optimally chooses a supplier arrangement that generates spillovers to the local industry. In the second chapter we study an incomplete contract model in which a buyer and a seller first agree on an efficient ownership structure and then bargain over the price of an input. We allow for asymmetric information at the ex post bargaining stage. The ownership structure that the agents agree on ex ante determines the payoff that each of them can realise before reaching agreement ex post. We show that an ownership structure that lowers the parties' joint pre-agreement payoffs accelerates ex post decision making but also makes delay in decision making more costly. We derive the ownership distribution that minimises the ex post bargaining inefficiencies. In the third chapter we compare the efficiency of private and public provision of contract enforcement services. We show that self-interested agents with coercive power may have an incentive to use this power to enforce contracts between third parties. However, such agents also engage in extortion. We analyse how social welfare depends on the number of self-interested agents with coercive power and whether such agents face democratic elections.

No description available.

No description available.

There is no abstract available for this dissertation. / Department of English

Despite the long-term economic and environmental benefits of cellulosic biofuel production, low rates of cellulose utilization and products syntheses are major techno-economical barriers to the commercialization. Optimized medium composition and low-cost nutrient source could greatly enhance the feasibility of large-scale biofuels synthesis by direct cellulose fermentation using a consolidated bioprocessing (CBP) approach. This study developed an improved growth medium for Clostridium thermocellum, an excellent cadidate for CBP that utilizes cellulose to produce ethanol, hydrogen, and other value-added biochemicals. An experimental design to determine the importance of nutrient components and concentrations on H2 and ethanol production from cellulose by C. thermocellum initially considered seven growth nutrients. Three most significant components - α-cellulose, yeast extract, and magnesium chloride were investigated in detail for their influence on rates and yields of H2 and ethanol production during cellulose fermentation by C. thermocellum. To explore individual and interactive effects of these nutrients on ethanol and hydrogen (H2) production, a central composite face-centered design and the response surface methodology was applied to predict optimum nutrient compositions for H2 and ethanol production. Experimental verification of predicted optima produced about 3-fold and 4-fold more H2 and ethanol respectively compared with the reference medium. These small-scale results were successfully verified in large-volume (7L), atmospheric cultures. Irrespective of culture conditions, relative improvement in rates and productivities of H2 and ethanol in optimized medium compared with reference medium were consistent with small-volume cultures. Various ethanol distillery co-products were tested for their potentials to replace expensive medium ingredients. Medium prepared with these co-products show excellent ability to suppport cell-growth and production of ethanol and H2 at concentrations equivalent to those generated from the reagent grade medium. Utilization of these low-cost nutrient sources to replace expensive reagent ingredients may potentially contribute to the viability of both grain-based ethanol and cellulosic biofuels. With medium optimization, scale-up and use of low-cost nutrient sources, this study represents one of the very few systematic research approaches to improve direct bioconversion of cellulosic biomass into biofuels.

The regioselectivity in Pd(0)-catalyzed direct arylation of pyrrole, thiophene, and indole can be improved by blocking some of the reactive sites with a chloride group, leading to increased yields of the desired regioisomers. Competition experiments and computational studies show that the blocking group also activates the substrates toward arylation. Due to the activated nature of chlorinated heteroaromatics, rare and sought after regioisomers, such as 3-arylthiophenes, can be obtained under mild conditions in good yields. Chlorine-bearing thiophenes arylated at C3 and C4 have the potential to undergo controlled regioregular polymerization under conditions developed in the field of polythiophene chemistry. Mechanistic studies support the hypothesis that the arylation of the substrates under investigation likely proceeds via the CMD transition state.

Direct capture of CO2 from ambient air is a developing technology, which is capable of removing CO2 directly from the atmosphere. Moreover, this technology is independent from sources of CO2 emissions. Hence, it can be set up at locations where pure stream of CO2 is needed such as in enhanced oil recovery. In this research, the performance of pelletized and natural limestone for CO2 capture from air in a fixed bed is studied. To compare the performance of sorbents for air capture, the effects of particle type (natural limestone and pelletized limestone), particle size (250-425 µm and 425-600 µm), gas flowrate (0.5 L/min and 1 L/min), and relative humidity, on the breakthrough time, breakthrough shape, and the global reaction rate are examined. Moreover, carbonation decay of sorbents over series of capture and regeneration cycles is studied. If the inlet stream (air) is humidified at 50% relative humidity, but the lime sorbents are not pre-hydrated, an axially non-uniform carbonated bed results. This phenomenon is due to the partial carbonation of sorbents at the first layers of the bed. While there is a competition between CO2 and water to react with CaO, partial carbonation reaction on the surface of the sorbents not only prevents further hydration, but also decreases the reaction rate at the surface. However, in comparison with a dry system where relative humidity was negligible and sorbents were not pre-hydrated, the observed carbonation conversion was higher. The best results were seen from experiments with pre-hydrated sorbents and humidified inlet stream. The smaller sorbent particles had a better performance (sharper breakthrough curve and longer breakthrough time) due to their greater surface area. A gas-solid reaction model was fitted to the breakthrough curves. Since at the beginning of carbonation there is no resistance of the product layer, it can be assumed that the process is reaction controlled. While after formation of the product layer (CaCO3), it becomes diffusion controlled. Results from fitted data also confirmed these conclusions. Moreover, each of sorbent went through 9 cycles and after each cycle the carbonation conversion of the sorbents was measured by TGA and the surface area by BET.

This thesis explores an applicative approach to two constructions in Chinese: the “oblique object” construction and the double object construction (DOC). The DP following the verb in an “oblique object” construction has generally been viewed as an object of the verb; however, its properties, especially object-associated properties, have not been tested systematically. This study tests the properties of the oblique object, and finds that the oblique object in the “oblique object” construction differs from a typical theme object in a range of syntactic properties. Pylkkänen (2002) hypothesizes that applicatives fall into two categories, high applicatives and low applicatives. Syntactically, the high applicative head is merged above the VP, with the VP as complement and the applied argument as specifier; semantically, high applicatives denote a relation between the applied argument and the event described by the VP. Low applicatives are base-generated within the VP, merging with the direct object as complement and the applied argument as specifier; semantically, a low applied argument bears a transfer-of-possession relation to the direct object. According to Huang (2007), Chinese has two types of DOCs, giving DOCs and stealing DOCs. Giving DOCs indicate situations in which the indirect object is given something or some advantage; stealing DOCs express situations in which the indirect object suffers some loss, or is adversely affected. In analyzing Chinese DOCs from an applicative approach on the basis of Pylkkänen’s high/low applicative hypothesis, Cheng and Wen (2008) suggest that Chinese DOCs are high applicatives, while Sun and Li (2010) suggest that they are low applicatives. This thesis suggests a finer classification of Chinese DOCs, and shows that Chinese DOCs include both high and low applicatives. Specifically, giving DOCs can be analyzed as low recipient applicatives. Stealing DOCs in which the indirect object bears a possessive relation to the theme can be analyzed as low source applicatives, and stealing DOCs in which the indirect object bears no direct semantic relation to the theme correspond to high malefactive applicatives. / Graduate

No description available.

No description available.