An examination of the relation between market structure and the profitability of audit engagements

Due to increasing supplier concentration, there is growing concern regarding the lack of competition in the audit market. Theory based on Cournot oligopoly predicts that increasing concentration will facilitate monopolistic behaviour. Conversely, if the market for audit services has more in common with a Bertrand oligopoly, concentration may not lead to higher fees. We evaluate whether increased audit supplier concentration leads to economic rents by investigating audit profitability. Using proprietary data from a (then) Big 6 audit firm, we find that local market structure has a significant and positive association with audit profitability, but not auditor effort for large clients.     

Market Effects of Voluntary Climate Action by Firms: Evidence from the Chicago Climate Exchange

Are private voluntary environmental actions by firms a sign of mismanagement, or a profitable “win-win” replacement for regulation? Empirical evidence is decidedly mixed. In this study, we use 19 years of monthly stock price returns, from 1991 to 2009, to examine the profitability of participation in CCX, a large voluntary greenhouse gas mitigation program. After controlling for systemic market risk as well as industry-specific shocks, we find statistically significant and positive excess returns for firms that announce their decision to join CCX. In addition, the progress of proposed greenhouse gas legislation (the Waxman–Markey bill) had a positive and large impact on excess returns for CCX member firms, suggesting that a major incentive for firms to join CCX may be to prepare for future regulation. Marginal abatement costs (proxied by the carbon price), on the other hand, were unrelated to excess returns. Our results imply that voluntary approaches should play a role in combating climate change, but that relying on them alone is not enough.     

Implications of the global growth slowdown for rural poverty

Over the past 25 years, higher growth in developing countries has contributed to a dramatic fall in global poverty, although poverty rates in rural areas remain higher than in urban areas. Unfortunately, projected growth rates have fallen in recent years; this article examines the impact of this slowdown on the poor, particularly the rural poor. It first uses a global model to assess the impacts of lower productivity on key price and income variables. It then uses microsimulation models for almost 300,000 households to assess the impacts on their real incomes. Although poverty rates overall are projected to fall substantially, the poorest countries see the greatest slowdown in poverty reduction, with over 5% of their population projected to remain below the poverty line. In addition, poverty rates will remain alarmingly high in many countries. Overall, 38 million fewer people will leave extreme poverty compared to earlier projections. Farm households are at particular risk in middle‐income countries, with over 1.5% more of the farming population remaining trapped in poverty than previously estimated. By 2030, average extreme poverty in rural areas is projected at about 7.5%, rather than 7.1% under the earlier growth projections. Clearly, a strong focus on policies for poverty reduction will be vital for eliminating poverty by 2030.