A higher minimum wage, in Michigan, has taken effect. The state's minimum wage increased, yesterday, from $7.40 to $8.15 per hour. The hike is part of a bill which is expected to raise employee pay by 25% over the next four years. By 2018, the minimum is expected to be at $9.25 per hour. This is the first increase in six years for the state. A group, Raise Michigan, petitioned for a wage of $10.10 per hour for all workers. They didn't receive enough signatures to make it to the next ballot.