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This study aims to investigate the influence of board interlocking in income smoothing practices in public companies with shares traded on the BM&FBOVESPA. To achieve this objective we adopted a sample comprised of 58 Brazilian companies included in the Bovespa index. The study is classified as empirical and analytical and uses as a proxy for income smoothing a metric called the "smoothing factor" (SF), obtained through the factor analysis technique using the metrics EM 1 and EM 3 from Leuz, Nanda and Wysocki (2003). As independent variables we employed indicators of social network analysis. From a theoretical point of view, the study is relevant and innovates in making the connection between the resource dependence theory, the agency theory and board interlocking. In practical terms, the study shows the effects of the constitutive elements of corporate social networks, arising from the board interlocking structure, on income smoothing accounting practices. Regression with panel data using fixed effects showed that the constituent elements of corporate social networks tend to influence the practice of smoothing in the sample used. The results of the study show that companies that share board members with other organizations which smooth their results tend to adopt this organizational practice more easily, which can be explained by: (i) companies causing variations in performance due to operational decisions or financial reporting choices; and (ii) managers making use of discretionary practices in the reporting of profits.

This study examines the association between the voluntary disclosure of economic and financial information and earnings management. The outlined arguments on the subject are based on the assumption that consistent voluntary disclosure policies may reduce earnings management. The analysis is conducted on a random sample of 66 non-financial Brazilian listed companies in the 2005-2012 period. To measure voluntary disclosure, the index proposed by Consoni and Colauto (2016) is used. As a proxy for earnings management, discretionary accruals (DA) are estimated based on the model by Dechow, Sloan, and Sweeney (1995). The relationship between these measurements is analyzed using a model of simultaneous equations and by the random effects regression method with panel data. A significant negative relationship was expected a priori; however, the main result of the study indicates that voluntary disclosure and earnings management are not simultaneously determined or associated. Although the results obtained contradict certain theoretical assumptions, there are alternative explanations for this finding. The empirical set of evidence in this research, in addition to those in previous studies, should be interpreted with caution because there is no consensus on the measures for voluntary disclosure and earnings management. Second, several companies in Brazil may not be interested in providing high-quality voluntary disclosure because most of their shareholders enjoy private benefits of control. This issue reduces the importance of the potential market demand for information, stratifies information asymmetry, and does not prevent earnings management.

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