Recent quotes:

A Cost-Benefit Analysis of Being Jewish - The Atlantic

Orthodox Judaism generally requires the most hours of an adherent's time, while Reform Judaism generally requires quite a lot less of an adherent's time. Therefore, based on income alone (which makes a person's time more or less valuable), “we would expect the members of Orthodox congregations to have the lowest wage rates and the members of Reform congregations to have the highest wage rates,” with Conservative Jews somewhere in the middle. And since education correlates well to income, we’d expect college and advanced degrees to be similarly-sorted throughout the denominations. Sure enough, Chiswick writes, “This pattern was clearly apparent by the mid-20th century.”