Competition authorities all over the world worry that integration between search engines (mainly Google) and publishers could lead to abuses of dominant position.  In particular, one concern is that of own-content bias, meaning that Google would bias its rankings in favor of the publishers it...

This paper develops an asymmetric price setting oligopoly model of store opening and closure decisions in the UK supermarket industry which is estimated using a survey of consumer choices and a dataset of store characteristics. The model is used to examine the strategic local entry and exit...

We present a general Cournot model in which each firm may sell multiple quality-differentiated products. We use an upgrades approach, working not with the actual products, but instead with upgrades from one quality to the next. The properties of single-product Cournot models carry over to the...

This paper develops a revealed preference methodology for exploring whether time inconsistencies in household choice are the product of nonstationarities at the individual level or the result of individual heterogeneity and renegotiation within the collective unit.  An empirical application to...

India's development experience over the past fifty years suggests that the increasing importance of the services sector deserves analysis.  The literature on structural change has emphasised changing patterns of demand as an explanation for the increasing importance of the services sector.  In...

We identify necessary and sufficient conditions under which a finite data set of price vectors and consumption bundles can be rationalized by a weakly separable utility function.  Our result could be understood as a generalization of Afriat's Theorem.

This paper provides a causal reason for failure in productive efficiency in the household and explains why some households may be less efficient than others.  In the theoretical model, spouses make labour allocation decisions in each period to generate income, facing a threat of divorce in the...

Consider a finite data set of price vectors and consumption bundles; under what conditions will there be a weakly separable utlity function that rationalizes the data?  This paper shows that rationalization in this sense is possible if and only if there exists a preference order on some finite...

We use survey data to investigate how urban households in Ethiopia coped with the food price shock in 2008 and idiosyncratic shocks.  Qualitative data indicate that the high food price inflation was by far the most adverse economic shock between 2004 and 2008, and that a significant proportion...

This paper examines the motivation for intergenerational transfers between adult children and their parents, and the nature of preferences for such giving behaviour, in an experimental setting.  Participants in our experiment play a series of dictator games with parents and strangers, in which...