Internet search rankings have a significant impact on consumer
choices, mainly because users trust and choose higher-ranked
results more than lower-ranked results. Given the apparent power
of search rankings, we asked whether they could be manipulated
to alter the preferences of undecided voters in democratic
elections. Here we report the results of five relevant double-blind,
randomized controlled experiments, using a total of 4,556 un-
decided voters representing diverse demographic characteristics
of the voting populations of the United States and India.