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Experimental auctions are widely used as a non-hypothetical value elicitation method to examine consumer preferences for novel, controversial foods. However, despite its advantages over hypothetical methods, its practice might lead to a wide variety of biases. The purpose of this paper is to provide a list of key cognitive biases and design effects in food auction research and to deliver scientifically underpinned procedures in order to assess, control and reduce them. Its applicability and relevance is examined in auctions on willingness-to-pay for folate (GM) biofortified rice.

Based on auction literature, a list of 18 biases has been developed. Experimental auctions were conducted with 252 women from Shanxi Province, China to test the occurrence of eight biases, while demonstrating measures to reduce the risk of ten biases.

The results lend support for three information-related effects, i.e. confirmation bias, conflicting product information effects and a primacy bias, but not for a multiple-good valuation effect, a panel size effect, a trial winner effect and time-related sampling biases. Furthermore, there are no clear indications of social desirability bias, auction fever and a false consensus effect.

This study emphasizes the need to take into account, and measure the risk of various biases when developing, organizing and interpreting experimental auctions. Future research should further extend the list of biases and validate the study findings.

By using a highly topical subject, this study is one of the first to address the potential risk of cognitive biases and design effects in experimental (food) auctions.

Biofortification of staple crops is a promising strategy to alleviate micronutrient deficiencies in rural populations of the developing world. The possibility to sell biofortified crops at “a good market price” plays a vital role for the acceptance by smallholder farmers. This study is therefore focused on non-farming consumers' willingness to pay (WTP) for biofortified crops.

Specifically, we elicited non-farming consumers' WTP a premium for the improved iron content (+30% iron) in a 1kg finger millet bag using a 2nd price Vickrey auction with six auction rounds and one health- and one process-related information treatment. Due to multiple bids per subject, premiums were analyzed using a linear mixed-effects model, controlling for market feedback and auction round.

Despite more than half of the respondents being skeptical toward new crop varieties, the acceptance rate was very high (98% with a WTP above zero). The average premium amounted to 27% and could be significantly increased with the provision of health-related information. In contrast, information about the breeding method was ineffective. The WTP was significantly higher for higher income and lower for higher age, education and skepticism toward new crop varieties and increased with increasing rounds.

Our results suggest that non-farming consumers are willing to pay “a good market price” for iron-biofortified finger millet. Our analysis also confirms the importance of health-related information for raising consumers' WTP. This information supports the further development and introduction of biofortified crops to alleviate micronutrient malnutrition.

This study adds to the still limited literature on consumers' WTP for iron-biofortified crops in India, focusing on non-farming consumers to assess the price such crops can achieve on the market.

Organic production and its consumption have grown tremendously in recent years. However, in the case of Spain demand still represents only 1 per cent of food expenditure. The main obstacle seems to be that organic food faces problems related to consumers’ acceptability; lack of food availability and seasonality make it difficult to establish appropriate retailing outlets; also, higher costs of production and retailer margins jointly may result in higher prices than consumers are willing to pay for organic food attributes. Research studies have mostly elicited consumers’ willingness‐to‐pay (WTP) for organic food through contingent valuation. Alternatively, explores, using an experimental second‐price sealed‐bid auction, the value that consumers place on organic food and the effect that information included on ecolabel and physical appearance have on their WTP. This methodological approach involves the use of real money and real products, which, in fact, may overcome the hypothetical bias detected in previous studies. Also discusses the effect on WTP of consumers’ demographic characteristics and lifestyles, as well as attitudes towards food safety and buying behaviour. Results show, that as more accurate information is offered, consumers’ acceptability of labelled organic food products increases; and that WTP is highly correlated with consumption habits variables.

The purpose of this paper is to assess Korean consumers' valuation for domestic rice and imported rice from China and the USA.

In order to identify Korean consumers' willingness to pay (WTP) for domestic, Chinese, and US rice, the non-hypothetical experimental auction approach (i.e. the random nth price auction) was utilized. Auction participants were randomly assigned to three treatments: no labelling information, country of origin labelling information, and food miles labelling information to analyze the effects of differing labelling information on consumers' valuation.

The results suggest that Korean consumers have a positive perception of and preference for domestic rice, particularly when country of origin information is provided. However, food miles information alone may not help consumers to distinguish between domestic and Chinese rice.

The marketing of imported rice will increase since Korea will be opening its rice market under tariffication after 2015. Therefore, it is necessary for Korea and other exporting countries to identify the feasibility of marketing both domestic and imported rice, and also to investigate which rice from specific countries Korean consumers prefer. Therefore, the authors conducted the random nth price auction using real rice products and cash in transactions.

Consumers' willingness to pay premium (WTPP) for two different types of agricultural brand labels (enterprise and regional), are evaluated through a non-hypothetical Random n-price auction experiment during the online purchase of fresh agricultural products. The purpose of this paper is to evaluate the two WTPP, compare their differences, and explore their sustainability.

Data were collected in July–August 2020 from a sample of 310 consumers in Liaoning Province, China. A nonhypothetical random n-price auction experiment was implemented in a simulated online shopping environment.

The results show that WTPP exists, and WTPP level of regional brand labels is higher than that of enterprise brand labels. Consumers' WTPP is sustainable. Consumers with low WTPP for enterprise brand labels and consumers with high WTPP for regional brand labels have stronger willingness to repurchase.

The results have direct practical implications for developing brand agriculture and encouraging “brand consumption”. The results can provide theoretical reference for policymakers, enlightenment for the development and effective dissemination of agricultural brand labels and important information to e-retailers on how to sale agricultural products with agricultural brand labels.

To the best of the authors' knowledge, no previous study has related WTPP and its sustainability for agricultural brand labels in China. We try to fill a gap in literature on consumers' WTPP for agricultural brand labels. And the authors explore the sustainability of WTPP by analyzing the impact of WTPP on repurchase intention and recommendation intention respectively.

The purpose of this paper is to examine the effect of health information and sensory attributes on consumer’s propensity to upgrade and their willingness to pay (WTP) for pasteurized milk in Ethiopia.

The authors used a framed market experiment with 160 participants in 14 central locations in urban Ethiopia. The authors used a double hurdle model to analyze consumer willingness to shift to pasteurized milk and their WTP for quality attributes in pasteurized milk.

Consumers are willing to pay a 4 percent premium for quality attributes in pasteurized milk. Male and employed participants are willing to shift and pay a premium for pasteurized milk. Conversely, consumers with more children, higher income, and higher raw milk consumption are less likely to shift to pasteurized milk. These results also show that taste is negatively related to consumer propensity to upgrade to pasteurized milk. Further, about half of the consumers who were provided with health information are willing to pay a premium of 11 percent for pasteurized milk, whereas others would pay only 6 percent. After providing the treatment group with health information, those consumers with higher income, old people and consumers with children are less likely to shift to pasteurized milk. Overall, consumer preference for raw milk is the result of taste, perceived nutrition and perceived health benefits. The study points at a segmented milk market and the consequent need for the provision of a targeted milk market promotion.

The application of experimental auctions in developing countries requires an extensive learning exercise for participants.

The authors used a non-hypothetical valuation mechanism to unravel the effect of subjective and intrinsic milk attributes in fluid milk choice decisions and its variation across socio-economic groups in a developing country context.

The purpose of this paper is to determine consumers’ willingness to pay (WTP) for tomatoes carrying different organic labels.

The data were collected from 878 randomly selected consumers in Shandong Province, China, using the Becker-DeGroot-Marschak auction experiment. The authors used the multivariate probit (MVP) model to analyze the factors influencing consumer preferences.

Results indicated that consumers’ WTP for tomatoes carrying the European Union (EU) organic label was significantly higher than those carrying the Chinese organic label. However, no significant difference was found between consumers’ WTP for tomatoes carrying the EU organic label and that for tomatoes carrying both Chinese and EU labels. The results of the MVP model analysis demonstrated that the consumers with different individual characteristics had heterogeneous preferences for organic labels. Food safety consciousness and organic knowledge both had positive effects on consumers’ WTP, meanwhile, environmental awareness had no prominent effect on consumer preferences.

This research is of academic value and of value to policy makers and suppliers. To satisfy diverse market requirements, governments, and manufacturers should consider consumer preferences for different certification labels in strategy development.

Consumer marketing suggests that greater concern for the environment is impacting purchase behavior. Recent surveys into US pro-environmental (PE) purchase patterns show a considerable gap between consumers’ attitude and actual behavior regarding PE products. What these products have in common is a normative component. This research aims to understand whether perceived consumer effectiveness (PCE) and social desirability bias (SDB) influence consumers’ purchase decisions regarding PE wine products and willingness to pay (WTP).

To assess whether PCE and SDB influence consumer’s actual WTP for PE and conventional wine despite normative beliefs (NBs), two studies with sample sizes of 117 and 124 were conducted in the USA. The first part of each study involved surveying participants as to their NB, SDB, PCE and demographics. The second part of the study measured their actual WTP through participation in an experimental auction.

Consumers with high levels of NBs were significantly more likely to pay higher premiums for PE wines compared to non-PE wines and had higher levels of PCE, suggesting that they believe their purchase behavior makes a difference to the environment. However, this same group is strongly influenced by SDB, indicating that they may “over-report” desirable behaviors. Controlling for PCE and SDB, the significant difference in price for PE wine and non-PE wine was mitigated. Those with lower NBs were just the opposite, less concerned whether their purchase behavior directly impacts the environment, feeling that non-PE wine may be a better value proposition.

The use of an auction method to assess actual behavior may be skewed by the attempt to get a winning bid, and this research was conducted in one particular part of the USA, which limits the generalizability of the results to other parts of the country or world.

The findings from the current research provide important information for wine producers, distributors and retailers, specifically the development of marketing and branding strategies, and as a method for normative product/brand differentiation in a competitive marketplace.

The mechanism by which organic labelling affects consumers’ willingness to pay (WTP) for wine is not yet fully understood. Organic labelling not only transports information about environmental benefits, but may also influence consumers’ perceptions of quality and taste. The purpose of this paper is to separate the information effect from the perception effect of an organic label on WTP.

Taste and quality perceptions of 110 German consumers and their WTP for white and red wines were collected in a second-price auction in conjunction with a blind tasting. Each measure was recorded under two experimental conditions: with and without organic labelling. Serial mediation analysis is used to identify the information and perception effect of an organic label on WTP. A moderating effect of commitment to organic consumption is considered.

Wines marketed as organic are perceived as tastier and of higher quality and value. The organic labelling effect is stronger for committed organic consumers. Mediation analysis confirms perceived better taste as a key driver for WTP, especially for less committed organic consumers. The findings highlight perceptions of wine quality as the main mediator through which organic labelling affects WTP for red wine and for committed organic consumers.

This paper adds to the literature by decomposing the signalling mechanism of organic labelling and by emphasising the role of individual characteristics in determining its magnitude and pathways. Implications from a marketing and wine industry’s perspective are discussed.

In this paper, we study the effect of induced positive and negative moods on traders' willingness to trade (pay and accept) in experimental asset markets.

We conduct experimental asset markets where subjects undergo a mood induction procedure prior to trade. After the subjects are induced with either negative or positive affect, they can trade an experimental asset with a known stream of dividends for a known number of periods.

We first show that both positive and negative affects are associated with larger positive deviations from fundamental values. We also show that when subjects are induced with positive mood, they bid higher prices but for fewer units of the stock. On the supply side, positive affect is associated with higher prices and quantities, and consequently in higher willingness to offer. Finally, we use our experimental data to test existing theories on mood effect. We find that negative affect is related to momentum trading, while positive affect is associated with information processing.

To our knowledge, this is the first work that studies the effect of mood on traders' behavior, rather than market outcomes.