Pitfalls in estimating the X-factor: The case of energy transmission regulation in Brazil

In Brazil, which has one of the biggest energy systems in the world, the National Electricity Regulatory Agency (Agência Nacional de Energia Elétrica – ANEEL) regulates the generation, transmission, distribution and commercialization of electricity. As a key step in running the incentive regulation regime, the regulator applies a DEA-based Malmquist index for estimating the X-factor, which reflects productivity gains that can be expected across all companies involved in the industry. This paper investigates the way the X-factor was estimated in 2015 by ANEEL in the transmission sector concerning the review period 2009–2014. The regulator applies a modified version of the Malmquist index developed by Ray and Desli [1] and also adapts the bootstrapping method of Simar and Wilson [2] to generate confidence intervals for an estimate of the X-factor. Analyzing ANEEL’s approach, we have discovered a number of serious analytical and computational shortcomings, which we demonstrate in the paper. On this basis, we address the effect of the estimated X-factor on social welfare, having the final customers to pay a higher price for electricity than they were supposed to

Does Economics have an Effect? Towards an Economics of Economics

"Due to its formality and highly analytic thinking, economics is often attributed a leading role among the social sciences and a prominent position as contributor to economic or social issues in the real world. Fact is, however, that the empirical proof for such a claim is either missing or anecdotal. This paper aims to outline the “economics of economics”. It surveys and compares approaches of impact measurement such as a production function of economics or the demand and supply of trained economists and discusses the determinants of the strength of the influence of economics. It furthermore discriminates between the impact of economic ideas versus that of economists as scientists or politicians.

Does corporate governance affect Australian banks' performance?

Worldwide, recent corporate collapses have added to the insecurity of financial markets, triggering regulatory responses. This study provides empirical evidence of the relationship between corporate governance and the efficiency of Australian banks between 1999 and 2013, using two-stage double-bootstrap data envelopment analysis. Of the five corporate governance factors considered, we find board size and committee meetings have robustly significant and positive effects on efficiency. We also find evidence of improvements in overall industry efficiency following the 2003 introduction of the Principles of Good Corporate Governance, but not of any statistically-significant influence of the GFC