This paper presents some theoretical foundations underlying the welfare analysis that can be established in order to quantify the impact on consumers, when an agent violates the rights of purchaser and such behavior is reflected in a price increase. This exercise allows us to conclude that if it...

The focus of this study is on black markets which provide an important segment of the parallel economy. These markets operate in disequilibrium,search and information costs become very important.Trafficking in drugs taken as case, to explore both theoretically and empirically. The problem,...

Many empirical studies have inferred contagion in behavior from a correlation between individual behavior and the behavior of others in the same social group, rather than from any direct evidence. The correlation has been variously attributed to social interaction, word of mouth communication,...

Is it better to apply effort to increase personal consumption, or control what one wants? The model presented here provides a characterization of demand for self control, namely, its responsiveness to price and risk. Unlike most other models of self control, the model does not identify self...

This paper surveys models of markets in which only some consumers are "savvy". I discuss when the presence of savvy consumers improves the deals available to all consumers in the market (the case of search externalities), and when the non-savvy fund generous deals for all consumers (ripoff...

This paper studies market competition when firms can influence consumers' ability to compare market alternatives, through their choice of price "formats". We introduce random graphs as a tool for modelling limited comparability of formats. Our main results concern the interaction between firms'...

A common sales tactic is for a seller to encourage a potential customer to make her purchase decision quickly. We consider a market with sequential consumer search in which firms often encourage first-time visitors to buy immediately, either by making an "exploding offer" (which permits no...

We consider a market with sequential consumer search in which firms can distinguish potential customers visiting for the first time from returning visitors. We show that firms often have an incentive to make it costly for its visitors to return after investigating rivals, either by making an...

The decision to introduce a national FuelWatch scheme provides a timely case study of `evidence-based- policy' making in Australia. The government based its decision on econometric work by the ACCC who refuse to release the data. They claim that their analysis is robust because it has been...

Using data supplied by InformedSources I find additional flaws in the ACCC analysis of FuelWatch. First, the drop in petrol prices that is so visually convincing in the ACCC chart S1 is in fact an artifact of the method of data construction and can be attributed primarily to increases in prices...