Conventional economic theory indicates that the free market contributes to allocative efficiency. However, specific energy markets present network industry characteristics which distance them from perfect competition. These markets, therefore, need effective regulation. The liberalizing reforms which took place in the Organization for Economic Cooperation and Development (OECD) and emerging countries from the 1990s onwards have reduced the share of state ownership in the energy sector, but not its functions of regulation, coordination and planning. It is also worth noting the expansion of the government’s agenda due to the energy transition that has unequivocally imposed itself in the 21st century. This article uses the Slacks-Based Measure of the Data Envelopment Analysis (SBM-DEA) methodology to investigate the relationship between market liberalization and sustainability in a low-carbon energy transition context. Taking the cases of the natural gas and electricity markets, we verify whether liberalization contributes to the progress of the energy transition, driven by the emergency need to tackle climate change. The results show that the most advanced markets, in their processes of opening up, tend to be positively associated with a more vigorous energy transition. European nations, such as the United Kingdom and Norway, have experienced a relatively more advanced market liberalization leading to an efficient path toward energy transition. Chile, Canada and Colombia also have efficient scores regarding their energy transitions. For low performing countries, such as Brazil, the study suggests some calls for action that should be pursued to improve their energy market indicators, resulting in a stronger energy transition towards renewables, more competitive energy prices and a larger participation of natural gas in the energy mix, which will contribute to decreasing its external dependency.

Esse artigo estima a "função de reação fiscal" do setor público consolidado brasileiro após o Plano Real. Para lidar com a incerteza referente às possíveis mudanças de regime ocorridas nesse período, adotou-se o modelo de "Markov-Switching", no qual a probabilidade de mudança de regime é determinada endogenamente. Os resultados obtidos sugerem fortemente que a política fiscal no Brasil apresentou dois regimes distintos após o Plano Real, e o final do ano 2000 marca o período mais provável da transição entre esses dois regimes. O regime "pós-2000" caracteriza-se por uma baixa (ou mesmo nula) reação do superávit primário a variações na dívida líquida do setor público (DLSP). Em contraste, no regime anterior a 2000 (de maior volatilidade) a reação do superávit primário a variações na DLSP é bastante evidente. Observou-se, ainda, que em ambos os regimes o superávit primário parece responder positivamente a variações no produto e que em nenhum dos dois regimes o governo parece ter utilizado explicitamente a política fiscal como instrumento de controle da inflação.

Despite consensus about the positive impact of broadband expansion on the economy, from an aggregate perspective, this impact does not seem to be homogeneous for the whole economy. By using a two-way multivariate panel data model subjected to Bayesian estimation, this study aims to determine the effect of broadband expansion on Brazilian economic sectors. To account for regional differences, the sampled data were grouped into clusters (clustering) to spot municipalities with similar characteristics. The results indicate that the impact of broadband expansion is not positive for all sectors. Actually, it was positive in more dynamic and technology-intensive sectors (e.g., industrial and service sectors) but negative for the agricultural sector.