What is the impact of modern transportation technology on long-run economic change in poor countries with high trade costs?  Rail construction in colonial Sub-Saharan Africa provides a natural experiment: 90% of African rail-road lines were built before independence, in a context where...

Expansion in mobile phone coverage has improved access to information throughout the developing world, particularly within sub-Saharan Africa.  The existing evidence suggests that information technology has improved market efficiency and reduced consumer prices for certain commodities.  There...

We report the short-term results from a randomized evaluation of a mobile phone literacy and numeracy program (Project ABC) in Niger, in which adult literacy students learned how to use mobile phones as part of a literacy and numeracy class.  Students in ABC villages showed substantial gains in...

The paper analyses the effects of the 1990 Brazilian trade liberalization on the total factor productivity, market share and profits of a sample of 349 large manufacturing firms. A panel data production function analysis.

When a supply and demand model is recursive, with errors uncorrelated across the two equations, ordinary least square (OLS) is the recommended estimation procedure. Supply to a daily fish market is determined by the previous night`s catch, so this would appear to be a good example of a recursive...

This paper is concerned with the nature of economic growth in 19 manufacturing industries between 1970-92. There is substantial heterogeneity (both across sectors and time) in rates of growth of value-added, hours worked, labour productivity and Total Factor Productivity during the sample...

The impact of profitability on capital accumulation, neglected in conventional accounts, is confirmed by a cross sectional analysis of the post-war experience of manufacturing in OECD economies and this is consistent with a body of time-series and firm level studies.

We develop a framework in which: (i) a firm can have a new product tested publicly before launch; and (ii) tests vary in toughness, holding expertise fixed.  Price flexibility boosts the strong positive impact on consumer beliefs of passing a tough test and mitigates the strong negative impact...

We show that introducing an external capital market with information asymmetry into a product market model reduces opportunistic substitution of sub-standard goods and encourages producers to concentrate on long-run reputation building.  We test this result with a laboratory experiment.  We...

This paper evaluates alternative strategic models of competition and market structure in online retailing, and makes comparisons with traditional retailing. Online consumers are less concerned than traditional consumers about spatial characteristics and more concerned about hidden quality...