Donald Trump promises to impose, soon after his inauguration, a new requirement on federal agencies: If they want to issue a new regulation, they have to rescind two regulations that are now on the books. The idea of 'one in, two out' has rhetorical appeal, but it's going to be extremely hard to pull off.

Republicans are right to express concern about excessive regulation, and they can do a lot to reduce it, above all by scrutinizing rules on the books and by putting all new proposals through a cost-benefit filter. There's room for plenty of creativity here.

As presidents from Ronald Reagan to Barack Obama have recognized, the real question is whether regulations, whether new or old, are justified. That requires a careful analysis of their costs and their benefits.

Cass Sunstein Quotes