Abstract
Using data on 434 Brazilian municipalities, this paper explores the influence both corruption and the size of the informal sector have on economic outcomes, while allowing for the possibility of spatial dependence. Overall, this paper finds that the size of the informal sector has a statistically significant and negative association with economic outcomes that is much larger in magnitude than what is predicted by least squares estimates due to its exclusion of spillover effects, while corruption has no significant relationship. Specifically, a one standard deviation increase in the size of the informal sector is associated with a 26 % cumulative decrease in GDP per capita, compared to the maximum of a 17 % decline predicted by least squares.
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Notes
The focus on this paper is exclusively on the effect of corruption and the size of the informal sector on income levels, though the direction of the effect likely goes both ways (see, e.g., Ihrig and Moe 2004; Gundlach and Paldam 2009). However, both of these reverse effects are slow to take effect (La Porta and Shleifer 2014; Gundlach and Paldam 2009) and are likely more important in longer run analyses. This paper considers relatively shorter-term effects (a maximum of ten years). However, these reverse causality concerns will be discussed and addressed in the results section of this paper.
As an example of how ignoring spatial dependence can cause OLS to either underestimate or overestimate effects of institutions on income levels, Bologna et al. (2016) find that once spatial dependence is taken into account, the positive impact of economic freedom on per capita income levels becomes larger in magnitude using US metropolitan areas as the unit of analysis.
La Porta and Shleifer (2008) estimate that a country starting with 50 % of employment associated with the informal sector, and subsequently experiences a growth in per capita income of 7 % per year such that it doubles in 10 years, would only see their informal employment drop to 20 % after 50 years.
However, this size has been decreasing slightly in more recent years due to an economic expansion (Corseuil and Foguel 2012). For example, informal employees accounted for 63 % of total employees in 2000, while informal employees accounted for only 56 % of total employees in 2010.
See Ferraz and Finan (2011) for details on the political processes in Brazilian municipalities and for examples of corruption occurring in these municipalities.
This definition of the informal sector includes military and public service employees, accounting for only about 17 % of informal employment as defined in this paper (IBGE). Results do not change when excluding military and public service employees from the definition. For brevity, these results are not presented in this paper, but are available upon request.
All main results are replicated in Appendix 2 “Full tables with corruption and size informal included separately ” where I do include corruption and informal sector size separately in each regression.
I additionally estimate results with \(k = 5\) and \(k = 7\) with no change in the results. Results available upon request.
GeoDa software is made freely available by the GeoDa Center for Analysis and Computation within the School of Geographical Sciences and Urban Planning at Arizona State University.
GeoDa output includes the Anselin–Kelejian (1997) (A–K) test statistic. The null hypothesis associated with this test is no remaining spatial autocorrelation in the error term. As reported below, the tests suggest that not all of the spatial dependence is captured by this technique. This fits with the specification testing results above; the WALD test indicates that the spatially lagged explanatory variables are especially important to include in specifications with income per worker as the dependent variable. Though the SAR results are reported as robustness checks, I consider the SDM to be the preferred specification.
The correlation coefficient between these two variables is 0.285.
The results in differ slightly from Bologna (2016) only because I include the additional institutional control variable.
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I would like to thank Claudio Ferraz and Frederico Finan for kindly sharing their data.
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Bologna, J. Contagious corruption, informal employment, and income: evidence from Brazilian municipalities. Ann Reg Sci 58, 67–118 (2017). https://doi.org/10.1007/s00168-016-0786-1
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DOI: https://doi.org/10.1007/s00168-016-0786-1