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Abstract Background Odors are represented by specific spatio-temporal activity patterns in the olfactory bulb of vertebrates and its insect analogue, the antennal lobe. In honeybees inhibitory circuits in the AL are involved in the processing of odors to shape afferent odor responses. GABA is known as an inhibitory transmitter in the antennal lobe, but not all interneurons are GABAergic. Therefore we sought to analyze the functional role of the inhibitory transmitter histamine for the processing of odors in the honeybee AL. Results We optically recorded the representation of odors before, during and after histamine application at the input level (estimated from a compound signal), and at the output level (by selectively measuring the projection neurons). For both, histamine led to a strong and reversible reduction of odor-evoked responses. Conclusion We propose that histamine, in addition to GABA, acts as an inhibitory transmitter in the honeybee AL and is therefore likely to play a role in odor processing.

This paper examines the effects of dynamic pricing versus simple price differentiation for services through price confusion and price unfairness perceptions on price-disadvantaged consumers' intentions to spread negative word of mouth (WOM); we additionally differentiate between these customers based on specific service purchase frequency. To test our hypotheses regarding price confusion as an important driver of undesirable consumer reactions to differential pricing for services and as a precedent of price unfairness perceptions, we conduct one qualitative study and three quantitative studies. The findings provide key theoretical insights indicating that 1) dynamic pricing leads to more price confusion than simple differential pricing and 2) price confusion triggers price unfairness perceptions that increase consumers' intentions to spread negative WOM. For frequently purchased services, the pricing tactic's effects on intentions to spread negative WOM are based mainly on price confusion; for infrequently purchased services, the intentions to spread negative WOM are based primarily on unfairness perceptions. The major managerial insight of our findings is that dynamic pricing should be avoided or limited when there is a high likelihood of reputation damage through negative WOM among price-disadvantaged customers. [ABSTRACT FROM AUTHOR]