An overview and assessment of the current state of research on individual consumption of Fair Trade (FT) products is given on the basis of 51 journal publications. Arranging this field of ethical consumption research according to key research objectives, theoretical approaches, methods, and study population, the review suggests that most studies apply social psychological approaches focusing mainly on consumer attitudes. Fewer studies draw on economic approaches focusing on consumers' willingness to pay ethical premia for FT products or sociological approaches relying on the concept of consumer identity. Experimental, qualitative and conventional survey methods are used approximately equally often. Almost all studies draw on convenience or purposive samples and most studies are conducted in the USA or the United Kingdom. Several problems in current research are identified: amongst others, studies' rather narrow theoretical focus, potential hypothetical and social desirability bias of conventional survey data, and a lack of generalizability of empirical findings. In turn, we suggest that research would benefit from both a multiple-motives and a multiple-methods perspective. Considering competing theories can help to single out key behavioral determinants of individual FT consumption. The combination of different methods such as conventional surveys and field experiments contributes to uncovering respondents' truthful answers and improves generalizability of results. Scholars in the field of ethical consumption research should use experiments to detect causal relations proposed by theories and conduct cross-country surveys to gather insights as to how differences in market structures, cultural traits, and other path dependencies affect patterns of individual FT consumption.

We address ethical consumption using a natural field experiment on the actual purchase of Fair Trade (FT) coffee in three supermarkets in Germany. Based on a quasi-experimental before-and-after design the effects of three different treatments - information, 20% price reduction, and a moral appeal - are analyzed. Sales data cover actual ethical purchase behavior and avoid problems of social desirability. But they offer only limited insights into the motivations of individual consumers. We therefore complemented the field experiment with a customer survey that allows us to contrast observed (ethical) buying behavior with self-reported FT consumption. Results from the experiment suggest that only the price reduction had the expected positive and statistically significant effect on FT consumption.

This article addresses ethical consumer behavior and uses the purchase of Fair Trade (FT) coffee to gain insights into determinants of 'moral behavior' in the marketplace. Our primary concern is to clarify which theoretical concepts and determinants are more useful than others in explaining FT consumption. We compare the explanatory power of consumer budget restrictions, consumer identity, social and personal norms, social status, justice beliefs, and trust. Our second aim is methodological; we contrast data on self-reported consumption of FT coffee with experimental data on hypothetical choices of different coffee products. To gain insights into the robustness of our measurement and findings, we test our propositions using two samples of undergraduate students from Germany and the United States. Our data show that consumer identity and personal norms are the major determinants of FT consumption in both samples, the results from survey-based data and from our experimental data are similar in this regard. Further, we demonstrate that studies based on a limited number of determinants might overestimate effects; the effect of justice beliefs for instance vanishes if other determinants are taken into account.

This article looks into the scope and causes of both ethnic discrimination intentions and discriminatory behaviour in the sphere of close private interactions. In practice, German students' willingness to move into flats which would be shared with a Turkish student is analysed by conducting a direct survey, a factorial survey and a field experiment. Results show that, independent of the method used, ethnic discrimination against Turks does not, overall, play a substantial role among university students looking for a place to stay. However, data from the factorial survey and from the field experiment reveal that ethnic discrimination does occur in specific scenarios: while male applicants, in particular, prefer places inhabited by females, this is only the case if the females are German. In sum, our analyses demonstrate that the gender dimension needs to be taken into account when investigating discrimination intentions and ethnic discrimination in the field of close private interactions.