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...

Reducing fixed cost duplication - a common justification for concentrated market structure - motivated the US government to relax the number of radio stations a firm could operate in any local market.  After deregulation the number of firms per market decreased.  The implied cost saving...

We present cross-country empirical evidence on the role of natural resources in explaining long-run differences in private investment as a share of GDP in a sample of 72 developing countries.  Our empirical results suggest important differences between oil and non-oil resources.  While revenue...

We identify anthropogenic contributions to atmospheric CO2 measured at Mauna Loa using a statistical automatic model selection algorithm (Autometrics).  We find that vegetation, temperature and other natural factors alone cannot explain the trend or the variation in CO2 growth.  Industrial...

We demonstrate major flaws in the statistical analysis of Beenstock, Reingewertz and Paldor (2012), discrediting their initial claims as to the different degrees integrability of CO2 and temperature.

This paper develops a model in which supply of a non-renewable resource can adjust through two margins: the rate of depletion and the rate of field opening.  Faster depletion of existing fields means that less of the resource can ultimately be extracted, and optimal depletion of open fields...

Africa is well endowed with potential for hydro and solar power, but its other endowments - shortages of capital, skills, and governance capacity - make most of the green options relatively expensive, while its abundance of hydro-carbons makes fossil fuels relatively cheap.  Current power...