Horse trading
An interesting paper out (via Mark Thoma) supports what many suspected - the petrol (gasoline) price really does drop before an election. According to two IMF economists, Claudio Paiva and Rodrigo Moita, there's a significantly larger average fall in real petrol prices (0.7% against 0.3%) in quarters leading up to an election; and the link's a lot stronger in some countries, where the difference is several percentage points.
The paper just points out a correlation, not a mechanism, and in some countries (such as the UK), where elections can be called at will by the governing party, the causal link could go the other way; parties could be timing the election for when exogenously low petrol prices make them more likely to do well, not working to bring down prices before an election.
According to the Washington Post, this news won't surprise everyone; three out of ten people in the US already believe that the drop in petrol prices before last month's elections were a political ploy; a belief which the Post dismisses as a "conspiracy theory".


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