The federal minimum wage is $7.25 per hour, up from $1.60 in 1968. Yet it has eroded in terms of what it can buy. Its value has fallen, because, despite more than a four-fold increase in the minimum wage over nearly a half century, it has not kept up with inflation. The 1968 value, when translated into 2014 dollars, was $9.58 per hour, as shown in the chart (left) from the Center on Wage and Employment Dynamics at the University of California, Berkeley. In other words, today’s minimum wage, at $7.25, buys about 25 percent less than it did in 1968. As the federal minimum wage has eroded, Sylvia Allegretto, the Center’s co-director, noted that numerous states and municipalities stepped…