Strip-tillage implements remove the residue from previous crops and form a seedbed ready for planting. An experiment was conducted to evaluate 5 row-cleaning devices. The proportion of residue removed by the implement was used as the performance indicator. Each of the 5 devices was evaluated at 2 speeds and orientations on the implement. The devices were tested in two blocks (fields) of corn residue (one high residue and one medium residue), and one field of wheat residue. An analysis was conducted, using a mixed-effects model, to compare the performance of the cleaners operating in the different conditions. All cleaners performed well, with no statistical difference in mean performance. All row cleaners performed more consistently in wheat residue, compared with performance in corn residue. Numerically, the consistency of the different cleaners was different, with one configuration performing less consistently than the other four. Edge-effects of the outside row unit of the implement had, in most cases, an insignificant effect on the row unit's cleaning performance.

Experimental willingness to pay (WTP) studies can be classified as hypothetical or non-hypothetical. In a hypothetical study, such as conjoint analysis, a subject does not need to make a real economic commitment. In contrast, in a non-hypothetical task such as in experimental auctions, a subject may need to actually buy the product. Subjects in hypothetical studies tend to overstate their true WTP. Consequently, researchers need to correct hypothetical values to obtain reliable WTP estimates. Recently, incentive-aligned and cheap talk approaches have been proposed as ways to correct for hypothetical bias. In a hypothetical task, a cheap talk script explicitly reminds the subject about the hypothetical nature of the task and its expected consequences. In an incentive-aligned task (non-hypothetical), subjects are randomly selected to physically buy the product. The objective of our study is to assess and compare the reduction of hypothetical bias in consumers’ willingness to pay for novel products by applying a generic, short, and neutral cheap talk script in a retail setting. To accomplish this objective, we employ non-hypothetical, hypothetical, and hypothetical with cheap talk treatments in our experimental design. We conducted our experimental retail study using conjoint analysis and open-ended elicitation mechanisms, utilizing Becker DeGroot Marshak (BDM) mechanism for the incentive-aligned treatments. Consistently in both elicitation mechanisms, using seemingly unrelated and random-effect Tobit techniques, we find that our cheap talk script is effective in eliminating the hypothetical bias. As expected, the hypothetical WTP values are significantly higher than the non-hypothetical values but the hypothetical values with cheap talk are not significantly different from incentive-aligned or non-hypothetical estimates. In addition, we find that open-ended estimates are significantly higher than conjoint analysis estimates and that emotions and familiarity can have significant impacts on WTP estimates.

Benefits and consequences of controversial products are debated in the public arena for the protection of consumers and to evaluate the market decisions made by industry and government. The food industry continues to develop new foods as well as processes to bring food to the market. Some of these processes bring to issue the safety of the products or the impact on the market, workers, or environment. Such controversial products or processes include BSE (mad cow disease), genetically modified organisms (GMO), antibiotics, pesticides, carbon monoxide modified atmosphere packaging, and food irradiation. This thesis sets out with the objective of understanding, developing, and utilizing methodologies similar to those used in other contingent valuation studies to evaluate how consumers are influenced by varying information using food irradiation as a focus subject. Food irradiation is a technological food process that continues to be debated and much information favoring and opposing it is readily available to the public, making it a suitable subject about which to study information effects and consumer acceptance. To accomplish this objective, consumers were surveyed in grocery stores in the state of Texas during the spring of 2006. As irradiated foods are not currently widely available, a hypothetical product, irradiated mangoes, was used to elicit information from survey participants. The survey was comprised of two parts. First general information regarding consumer knowledge and trust of food irradiation as well as willingness to pay (WTP) was collected. Second, varying information regarding food irradiation (positive, negative, or mixed) was presented and questioning was reaccomplished. Evaluation of the survey data was made in three papers, each comprising its own chapter in this thesis. The first paper evaluates consumers’ initial trust and knowledge of food irradiation and how these factors interact with information in changing WTP. The second paper assesses responses for a “cheap talk” effect. Cheap talk is informing consumers of the existence of hypothetical bias in studies of this type with the goal being to reduce this bias to real life response equivalence. The third paper evaluates not only WTP, but also how consumer trust is affected by varying forms of information.

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For decades, researchers have seen employee empowerment as the means to achieving a more committed workforce that would deliver better outcomes. The prior conceptual and descriptive research focused on structural empowerment, or workplace mechanisms for generating empowerment, and psychological empowerment, the felt empowerment. Responding to calls for intervention studies, this research experimentally tests the effects of structural empowerment changes, through different degrees of decision-making authority and access to customer-relationship information, on psychological empowerment and subsequent work-related outcomes. Using a virtual contact center simulation, crowdsourced workers responded to customer requests. Greater decision authority and access to customer-relationship information resulted in higher levels of psychological empowerment which in turn resulted in task satisfaction and task attractiveness outcomes among the crowdsourced customer service workers.

We run a large-scale natural field experiment to evaluate alternative strategies to enforce compliance with the law. The experiment varies the text of mailings sent to potential evaders of TV license fees. We find a strong effect of mailings, leading to a substantial increase in compliance. Among different mailings, a threat treatment which makes a high detection risk salient has a significant deterrent effect. Neither appealing to morals nor imparting information about others' behavior enhances compliance on aggregate. However, the information condition has a weak positive effect in municipalities where evasion is believed to be common. (authors' abstract)

This dissertation consists of three essays exploring the heterogeneity of gender differences in behavior across contrasting societies. Are women naturally wired to behave differently than men or is it the social context in which the gender roles operate that motivate their behavior? I study this question in the contexts of risk, trust, and trustworthiness, moral hazard and repayment behavior in microfinance. I use the approach of conducting controlled field experiments in neighboring matrilineal and patrilineal societies in rural India. The two societies differ in gender roles but are comparable otherwise. Understanding the societal and cultural factors that drive gender differences in behavior helps to prescribe optimally-targeted policy designs. The first essay evaluates the universal policy of gender targeting to mitigate microfinance loan defaults and studies the reasons for such gender differences in default. I design and conduct microfinance field experiments with individual and group liability treatments in comparable matrilineal and patrilineal societies in India. I observe a reversal of gender effect on loan default across the two societies. I find that women have a lower default in the patrilineal society but higher default in the matrilineal society compared to their male counterparts. I also find that group liability leads to moral hazard among the individual group members but reduces overall default due to risk sharing among them. My results suggest that while women are better clients on average, a universal policy of gender targeting to reduce defaults in microfinance might be suboptimal. The second essay builds on the findings of the first essay that group liability contracts lead to moral hazard among the borrowers. In this essay, I evaluate the policy of gender targeting to mitigate moral hazard problems in microfinance and study the underlying reasons for such gender differences in moral hazard. I address this question by following a similar methodology to the first essay. My experimental design allows decomposing the different moral hazard channels through which default occurs in microfinance and interact them with gender and types of societies (matrilineal and patrilineal). I find that women in matrilineal society are more prone to exhibit moral hazard behavior than patrilineal women. Based on my findings, I argue that the gender differences in moral hazard is driven by the difference in social context, norms and the gender roles between the two societies. The final essay examines what drives gender differences in trust and trustworthiness, by conducting trust experiments in neighboring matrilineal and patrilineal societies in India. I find that on average the matrilineal subjects are more trusting as well as more trustworthy than the patrilineal subjects, but there is a significant heterogeneity in gender effects. Women in matrilineal society are both less trusting and less trustworthy than patrilineal women, compared to their male counterparts. This finding holds true even after controlling for risk preference and other individual characteristics. My findings suggest that societal structures are crucially linked to the observed gender differences in trust and trustworthiness.

The role of a roof on any building is to separate the interior environment of the building from the exterior environment, thereby making it a crucial component of the building design. Metal roof edges are the first line of defense against wind-induced loads on the roof system; however, data on the nature of these loads acting on the roof edge system is scarce. Previous studies with field measurements of wind pressure acting on the roof edge reported that metal flashings experienced negative pressure. These findings suggest that current building codes in North America (i.e. NBCC and ASCE codes) do not accurately identify wind design loads acting on roof edge systems. The Roof Edge Systems and Technologies (REST) project is a consortium of academia, government and roof industries, which was created to develop testing protocols and design guidelines for roof edges. The work presented in this thesis contributes to the collection and analysis of wind loads acting on metal roof edges, which were installed on the Canada Post building in Vancouver, Canada. The thesis presents the findings and analysis of the measured wind-induced pressure acting on all surfaces of three different edge configurations, namely the Anchor Clip Configuration (ACC), Continuous Cleat Configuration (CCC) and Discontinuous Cleat Configuration (DCC). The analysis showed the presence of negative pressure acting on all three faces of the configurations, in which the type of configuration had minimum effect on the magnitude and nature of the wind-induced loads. Furthermore, the top face of the edge configurations was found to experience the highest suction, and the front face of the edge coping was subjected to a net outward suction force due to the combination of the suction experienced by the coping front face and the positive pressure acting on the cleat. Comparison of these results with current NBCC and ASCE building codes highlight a need to update these codes in order to adequately design metal roof edges against wind action.

Trusting autonomous vehicles is seen as crucial for their dissemination. However, research on autonomous driving so far is restricted by using closed training courses or simulators and by comparing behaviour and evaluation while driving oneself (a manual car) with being driven (by an autonomous car). In the current study, we investigated passengers’ eye movements, categorized as safety-relevant or not safety-relevant, and trust ratings while being driven, once manually and once by an autonomous car, in real traffic as well as in a simulator. As some of the effects observed in the field experiment might have been caused by driving style, driving style was additionally varied in the simulator. Fixations in safety-relevant regions (e.g., on the road and steering wheel) were observed more frequently during safety critical driving situations than during regular driving. More safety-relevant fixations for the autonomous compared to the manual driving mode were observed particularly in the field. Trust ratings were affected by driving mode mainly in the simulator: Here, being driven autonomously led to a lower reported trust than believing to be driven by a human driver. Driving style showed to affect trust ratings, but not gaze behaviour in the simulator experiment. Correlations between gazing into safety relevant regions and trust ratings were of smaller descriptive size than in recent investigations on drivers, suggesting that gazing into safety-relevant regions as objective alternative to trust ratings may not be as exhaustive for passengers as for drivers.

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