For this reason, PPP is a more reliable comparison for the currencies of economies with similar levels of income.

ECONOMIST: The Big Mac Index

This means the athletic department profit number is probably the most reliable in terms of direct comparison.

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The more reliable three-month on three-month comparison showed prices fell by 1.5% in October.

BBC: House prices fell 0.7% in October, says Nationwide

Yet in comparison, jet engines-- having fewer moving parts--are ten times more reliable than pistons.

FORBES: Magazine Article