Periparturient relaxation of immunity (PPRI) to parasites in mammals results in higher worm burden and worm egg excretion and may have a nutritional basis. Nippostrongylus brasiliensis re-infected lactating rats fed low-crude protein (CP) diets show an augmented degree of PPRI compared with their high CP-fed counterparts. However, such effects of CP scarcity have been confounded by metabolisabl...

It is well established that consumers infer value from scarcity, which Cialdini (1984) called the scarcity principle. We demonstrate the reverse of this effect of scarcity on perceived value – consumers infer scarcity of product supply from product attractiveness. We show that this effect arises from the operation of what we call “the value heuristic”. In addition, we show that the value heuris...

We consider a model of cake-eating with private information. The model captures phenomena such as trust and “security of supply” in resource-use relationships. It also predicts supply shocks as an equilibrium phenomenon: privately informed sellers have incentives to reveal resource scarcity too late, through a supply disruption, after which they exploit the consumers’ inability to immediately a...

The main goal of this work is to provide an analysis methodology for assessment of water scarcity problems based on supply and demand. To this end, we must first determine what can be considered as supply and demand in the water scarcity problem. Although some variables involved are physical, economical or demographical, in our approach social factors are also included. This leads us to objecti...

Traditional micro-economic theory assumes that consumer preferences are independent of market forces like supply, demand, and price. However, this assumption is inconsistent with psychological research on commodity theory (Brock 1968). This research has found that scarcity enhances the desirability of experiences and objects. Two studies were conducted to test the possibility that these scarcit...