Effects of Oil Discoveries in Brazilian Municipalities

Francesco Caselli (Professor of Economics) and Guy Michaels (Lecturer in Economics), London School of Economics


Our research examines the effect of oil discoveries on Brazilian municipalities. Oil endowments, and hence oil production, vary widely across municipalities, and we show that oil output is not correlated (conditional on a few geographical controls) with other municipal characteristics.

In other words, oil-rich municipalities differ from oil-poor municipalities only because the former have oil and the latter do not. This makes it possible to ask whether oil has positive or negative effects on other market activities. Furthermore, oil-producing municipalities are entitled to royalties, so we can investigate the consequences of an oil-related revenue windfall for the local government.

We begin by investigating the effects of oil on other market activities and find that these are small. In particular, if a Brazilian municipality generates one unit of the national currency (the real), of extra value added from oil, this translates into roughly one real of extra aggregate GDP. This indicates that, to a first approximation, oil production has no effects, either negative or positive, on non-oil activities.

We do find some small changes in the composition of non-oil GDP when the oil is located onshore: the manufacturing sector shrinks and the service sector expands. (These effects are probably due to an expansion of services to oil operations and oil workers.) But offshore oil has little impact on non-oil GDP or on its composition.

We turn next to the revenue windfall. We confirm that municipal revenues increase significantly with oil production, and that oil royalties account for the bulk of this increase. This makes it clear that royalty payments are not undone by offsetting changes in other transfers from the state or federal governments (or by tax cuts) — in fact, they are somewhat reinforced.

The increase in municipal revenues arising from oil is matched by a corresponding increase in municipal expenditures. Municipalities that receive oil windfalls report significant increases in spending on a variety of goods and services, such as housing and urban infrastructure, education, health, transport and transfers to households.

Given the significant expansion in reported spending, we might expect sizable improvements in living standards for the local population. We therefore look at measures of housing quality and quantity, the supply of educational and health inputs, road infrastructure, and welfare receipts.

The results paint a complex picture, with no apparent changes in some areas, small improvements in others, and a small worsening in yet others. On balance, however, the data appear to suggest that the actual flow of goods, services, and transfers to the population is not quite commensurate with the reported spending increases stemming from the windfall. This shortfall we dub “missing money”.

To confirm that the windfall does not trickle down to the population through other channels, we look at household income and find only minimal improvements. We also show that oil-rich municipalities did not experience a differential increase in population. This implies that our results are not driven by a dilution of the benefits of oil abundance. Furthermore, the fact that people do not flock to oil-rich communities reinforces our message that oil abundance has not been viewed as particularly beneficial.

Our finding that oil windfalls translate into little improvement in the provision of public goods or the population’s living standards raises a key question — where are the oil revenues going? As a way of addressing this question, we put together a few pieces of tentative evidence:

  • First, oil revenues increase the size of municipal workers’ houses (but not the size of other residents’ houses).

  • Second, Brazil’s news agency is more likely to carry news items mentioning corruption and the mayor in municipalities with very high levels of oil output (on an absolute, though not per capita, basis).

  • Third, federal police operations are more likely to occur in municipalities with very high levels of oil output (again in absolute terms).

  • And finally, we document anecdotal evidence of scandals involving mayors in several of the largest oil-producing municipalities, some of which involve large sums of money.

As a partial explanation of why senior municipal workers may have thought that they could “get away” with large-scale alleged theft in a country where local elections are held regularly, we note that a survey in the largest oil-producing municipality found considerable ignorance among residents about the scale of the municipal oil windfall.

How much can we generalise from our findings to other settings? We acknowledge that what might be true for Brazil need not apply to other countries. More importantly, there are a number of prominent explanations for the “resource curse” that only operate at the national level.

For example, some argue that resource abundance leads to an overvalued nominal exchange rate, with deleterious consequences for competitiveness. Naturally, this cannot show up across municipalities, which do not print their own currencies. Similarly, our analysis cannot test the hypothesis that resource abundance is a cause of political violence and civil war.

But our results do lend some credence to the view that oil royalties are somehow easier to steal than other types of revenues. When we look at the usage and effects of municipal revenues coming from other sources, we find significant differences relative to revenue coming from oil, and the puzzle of “missing money” is less severe

This may be because citizens themselves are more tolerant of corruption when the money does not come from tax revenues. Or it may be because they have less accurate information on the amounts flowing to the government in the form of oil royalties. We are unable to explore these possibilities with our data.

But our findings do suggest that it may be somewhat unwise to channel revenues from oil operations directly to local governments, at least if the officials are not properly monitored and accountable. For Brazil, this may be an especially important consideration as the system of property rights and royalties will probably be overhauled in response to the recent discovery of huge new offshore fields.

Indeed, the issue is clearly of political relevance, with several major federal legislative proposals to reform the royalty system currently pending. Most proposals tend to reduce both the share of royalties going to local governments and the discretion that these governments have in using the revenues. In the summer of 2009, the federal government issued its own proposals for the property rights regime of the newly discovered “pre-salt” giant oilfields.

More generally, our results may inform the debate about increasing transparency requirements both in poor, resource-abundant countries and in countries that receive aid. In particular, it is increasingly common for conditionality-based programmes to feature stringent reporting requirements from multinational oil companies and recipient governments.

Our results suggest that accounting transparency per se may be insufficient. Reporting schemes should document the actual effective disbursement of sums, and not merely their recording on balance sheets.