This paper identifies patterns of cross-sectional and temporal price dispersion-in the Spanish online grocery retail market-and evaluates the extent to which search costs and chain heterogeneity explain such dispersion. We build a data set comprising 836,074 prices for the most popular grocery...

This paper examines a homogeneous-good Bertrand-Edgeworth oligopoly model to explore the role of firm size and number in pricing. We consider the price impact of merger, break up, investment, divestment, entry and exit. A merger leads to higher prices only when it increases the size of the...

The blame for the recent financial crisis has been attributed to modern macroeconomic theory rather than banking and finance. This article defends modern macroeconomics against its critics arguing that the critics have missed the point of why macroeconomics is carried out in the way it is. It...

The purpose of this paper is to clarify the difference between the mainstream and Keynesian understandings of uncertainty which persists in spite of superficial similarities. It is argued that the difference stems from the mainstream habit of thinking in terms of a full-information benchmark,...

This paper uses cross country regression analysis on a large set of countries to consider two hypotheses. The first is that increased public debt as a percentage of the economy reduces confidence in financial institutions. The second is that increased public debt relative to the economy lowers...